Developers and Open Source authors now have a massive amount of services offering free tiers, but it can be hard to find them all in order to make informed decisions.
This is list of software (SaaS, PaaS, IaaS, etc.) and other offerings that have free tiers for developers.
The scope of this particular list is limited to things infrastructure developers (System Administrator, DevOps Practitioners, etc.) are likely to find useful. We love all the free services out there, but it would be good to keep it on topic. It's a bit of a grey line at times so this is a bit opinionated; do not be offended if I do not accept your contribution.
You can help by sending Pull Requests to add more services. Once I have a good set of links in this README file, I'll look into a better layout for the information and links (help with that is appreciated too).
NOTE: This list is only for as-a-Service offerings, not for self hosted software.
- Source Code Repos
- Tools for teams & Collaboration
- Code Quality
- Code Search and Browsing
- CI / CD
- Security and PKI
- Management Systems
- Log Management
- Translation Management
- Monitoring
- Crash / Exception handling
- Search
- CDN and Protection
- PaaS
- BaaS
- Web Hosting
- IaaS
- DBaaS
- STUN, WebRTC, Web Socket Servers and other Routers
- Issue tracking / Project management
- Storage and Media Processing
- Design & UI
- Data Visualization on Maps
- Package Build Systems
- IDE and Code Editing
- Analytics, Events and Statistics
- International Mobile number verification API and SDK
- Payment / Billing Integration
- Other Packs
- Docker Related
- Alternate container hosting
- Vagrant Related
- Vagrant box indexes
- Data mining
- Other lists
- https://bitbucket.org/ - Free unlimited public and private repos (git and mecurial) for up to 5 users
- http://chiselapp.com/ - Unlimited public and private Fossil repositories
- https://github.com/ - Free for an unlimited number of public repositories
- https://about.gitlab.com/ - Unlimited public and private git repos with unlimited collaborators
- https://hub.jazz.net/ - Unlimited public repos, private repos free for up to 3 accounts.
- https://visualstudio.com/ - Free unlimited private repos (Git and TFS) for up to 5 users per team
- https://assembla.com/ - Free repo hosting in a free plan.
- http://www.fogcreek.com/kiln/ - Free unlimited public and private repos (hybrid of git and mecurial) for 2 users.
- http://appear.in/ - One click video conversations, for free
- https://www.flowdock.com/ - Chat and inbox, free for teams of 5 or less
- https://slack.com/ - Free for unlimited users with some feature limitations
- https://hipchat.com/ - Free for unlimited users with some feature limitations
- https://gitter.im/ - "Chat, for GitHub". Unlimited public & private rooms, free for teams of up to 25
- http://www.google.com/hangouts/ - One place for all your Conversations, for free (Need Google Account)
- https://kato.im/ - Team Chat & Collaboration, free for unlimited users with some feature limitations
- http://seafile.com/ - Private or cloud storage, file sharing, sync, discussions. Private version is full. Cloud version has just 1 GB.
- https://sameroom.io/ - Free for unlimited users with some feature limitations
- https://yammer.com/ - Private social network standalone or for MS Office 365. Free, just a bit less admin tools and users management features.
- https://www.blockspring.com/ - Share scripts with anyone on your team: cross language and with spreadsheet users. Free for 5 million runs a month.
- https://helpmonks.com/ - Shared inbox for teams - Free for open source projects and non-profit organizations.
- http://typetalk.in/ - Share and discuss ideas with your team through instant messaging on the web or on your mobile.
- https://talky.io/ - Free group video chat. Anonymous. Peer‑to‑peer. No plugins, signup, or payment required.
- http://sourcetalk.net/ - Code discussion tool, free for open code talks.
- http://vipaar.com/ - Help over video with augmented reality. Free without analytics, encryption, support.
- https://evernote.com/ - Tool for organizing information. Share your notes and work together with others.
- https://www.wunderlist.com/ - Share your lists and work collaboratively on projects with your colleagues - Available for free to download and use on iPhone,iPad,Mac,Android,Windows and the Web.
- http://doodle.com/ - The scheduling tool you'll actually use. Find a date for a meeting 2x faster!
- https://sendtoinc.com/ - Share links, notes, files and have discussions. Free for 3, 100 MB.
- https://www.zoom.us/ - Secure Video and Web conferencing, add-ons available. Free limited to 40 min.
- https://ideascale.com/ - Allow clients to submit ideas and vote, free for 25 members in 1 community.
- https://filehero.io/ - Make it easy to access your company's file storage from a corporate download page. Free for 5 concurrent downloads.
- https://codenvy.com/ - Share developer environments for your project. Includes configuration for the browser IDE, build, debug and run environments. Free tier with 4GB environments and support for >90 languages.
- http://tachikoma.io/ - Dependency Update for Ruby, Node.js, Perl projects - free for Open Source
- https://landscape.io/ - Code Quality for Python projects, free for Open Source
- https://codeclimate.com/ - Automated code review, free for Open Source
- https://houndci.com/ - Comments on github commits about code quality - free for Open Source
- https://coveralls.io/ - Display test coverage reports - free for open source
- https://scrutinizer-ci.com/ - Continuous inspection platform - free for Open Source
- https://codecov.io/ - Code coverage tool (SaaS), free for Open Source
- https://insight.sensiolabs.com/ - Code Quality for PHP/Symfony projects, free for Open Source
- https://www.codacy.com/ - Automated code reviews for PHP, Python, Javascript, Scala and CSS - free for open source
- https://www.pullreview.com/ - Automated Code Review for Ruby in GitHub, Bitbucket and Gitlab - free for Open Source
- http://gocover.io/ - Code coverage for any Go package
- http://inch-ci.org/ - Documentation badges for Ruby, JS & Elixir
- https://scan.coverity.com/ - Static code analysis for Java, C/C++, C# and JavaScript - free for Open Source
- https://sourcegraph.com/ - Java, Go, Python, Node.js, etc., code search/cross-references - free for open source
- https://searchcode.com/ - comprehensive text-based code search - free for open source
- https://codeship.com/ - 100 private builds / month, 5 private projects. Unlimited for Open Source
- https://circleci.com/ - Free for one concurrent build
- https://travis-ci.org/ - Free for public Github repositories.
- http://wercker.com/ - Free for public and private repositories
- https://drone.io/ - CI platform that includes browser testing, free for Open Source
- https://semaphoreci.com/ - 100 private builds / month. Unlimited for Open Source.
- http://www.shippable.com/ - Free for 1 build container, private and public repos, unlimited builds.
- https://snap-ci.com/ - Free for public repositories, 1 build at the time
- http://www.appveyor.com/ - CD service for Windows. Free for open-source projects.
- Comparison of Continuous Integration services
- https://saucelabs.com/ - CI with scalable testing for mobile and web apps, free for Open Source
- http://ftploy.com/ - 1 project w/ unlimited deployments
- https://deployhq.com/ - 1 project w/ 10 daily deployments
- https://hub.jazz.net/ - 60 minutes of free build time / month.
- https://styleci.io/ - Public GitHub repositories only.
- http://deploybot.com - Free for 1 repository, private or public. Supports any service you can throw at it.
- https://www.bitrise.io/ - iOS CI/CD with 200 free builds per month
- http://vaddy.net/ - Continuous web security testing with continuous integration (CI) tools. 3 domains, 10 scan history for free
- https://www.globalsign.com/en/ssl/ssl-open-source/ - Free SSL certs for Open Source projects
- https://www.startssl.com/ - Free SSL certs
- http://www.soclall.com/ - Free up to 1,000 users login, post, share through top 20+ social networks
- https://stormpath.com/ - Free user management, authentication, social login, and SSO.
- https://auth0.com/ - Hosted free for development SSO
- https://getclef.com/ - New take on auth unlimited free tier for anyone not using premium features
- https://ringcaptcha.com/ - Tools to use phone number as id, available for free
- https://www.ssllabs.com/ssltest/ - Very deep analysis of the configuration of any SSL web server
- https://qualys.com/forms/freescan/owasp/ - Find web app vulnerabilities, audit for OWASP Risks
- alienvault.com ThreatFinder - Uncovers compromised systems in your network
- https://duosecurity.com/ - Two-factor authentication (2FA) for website or app. Free 10 users, all authentication methods, unlimited, integrations, hardware tokens.
- https://www.tinfoilsecurity.com/ - Automated vulnerability scanning. Free plan = weekly XSS scans.
- http://www.acunetix.com/free-network-security-scanner/ - Free vulnerability & network scanning for 3 targets
- https://www.ponycheckup.com/ - An automated security checkup tool for Django websites.
- https://www.foxpass.com/ - Hosted LDAP and RADIUS. Easy per-user logins to servers, VPNs, and wireless networks. Free for 10 users.
- https://www.opswatgears.com/ - Security Monitoring of computers, devices, applications, configurations... Free 25 users and 30 days history.
- https://bitninja.io/ - Botnet protection through a blacklist, free plan only reports limited information on each attack
- https://bitnami.com/ - Deploy prepared apps on IaaS. Management of 1 AWS micro instance free
- http://www.visualops.io/ - 3,600 instance hours per month free
- https://papertrailapp.com/ - 48 hours search, 7 day archive, 100MB/month
- https://logentries.com/ - Free up to 5GB/month with 7 day retention
- https://www.loggly.com/ - Free for a single user, see the
liteoption - http://sematext.com/logsene - Free for 1M logs, unlimited retention
- https://www.sumologic.com/ - Free up to 500MB/day, 7 day retention
- https://lingohub.com/ - free up to 3 users, Open Source projects are always free
- https://www.getlocalization.com/ - free for public projects
- http://webtranslateit.com/ - free up to 500 strings
- http://transifex.com/ - free for Open Source projects
- http://www.oneskyapp.com/ - limited free edition for up to 5 users, free for Open Source projects
- https://crowdin.com/ - Unlimited projects, unlimited strings and collaborators for Open Source projects
- https://opbeat.com/ - Application performance, errors & releases. Free with 24 hour data retention.
- https://checkmy.ws/en/solutions/free-forever-for-foss/ - Free 15 days full demo and 3 websites forever free for Open Source projects.
- http://www.appneta.com/ - Free with 1 hour data retention
- https://www.thousandeyes.com/ - Network & user experience monitoring. 3 locations, plus 20 data feeds of major web services free.
- https://www.datadoghq.com/ - Free for up to 5 nodes
- http://www.stackdriver.com/ - Free for up to 10 nodes/services
- https://keymetrics.io/ - Free for 2 servers with 7 days data retention
- http://newrelic.com/ - Free with 24 hour data retention
- https://nodequery.com/ - Free basic server monitor up to 10 servers
- https://www.pingdom.com/free/ - 1 site free
- http://www.watchsumo.com/ - Free website monitoring, 50 Http(s), Ping or Keywords, every 5+ minutes
- https://www.opsgenie.com/ - Alert management with mobile push. 600 free alerts for 2 users a month
- https://www.runscope.com/ - Monitor and log API usage. Single user 10,000 request/month free
- http://www.circonus.com/ - Free for 20 metrics
- https://uptimerobot.com/ - Website monitoring, 50 monitors free
- https://www.statuscake.com/ - Website monitoring, unlimited tests free with limitations
- http://www.boundary.com/ - Free 1 second resolution for up to 10 servers
- https://ghostinspector.com/ - Free website and web application monitoring. Single user, 100 test runs per month
- http://java-monitor.com/ - Free monitoring of JVM's and uptime
- http://sematext.com/spm - Free for 24h metrics, unlimited number of servers, 10 custom metrics, 500K custom metrics data points, unlimited dashboards, users, etc.
- https://sealion.com/ - Free up to 2 servers, 3 days data retention, graphs and raw command output history (
top,ps,ifconfig,netstat,iostat,free, custom, etc.) - https://www.stathat.com/ - Get started with ten stats for free, no expiration.
- https://www.skylight.io/ - Free for first 100k requests
- https://www.appdynamics.com/ - Free for 24h metrics, application performance management agents limited to one Java, one .NET, one PHP, and one Node.js
- https://deadmanssnitch.com/ - Monitoring for cron jobs. 1 free snitch (monitor) - more available if you refer others to sign up
- https://www.librato.com/ - Free up to 100 metrics at 60s resolution
- https://freeboard.io/ - Free for public projects. Dashboards for your Internet of Things projects.
- https://loader.io/ - Free load testing tools with limitations.
- http://www.probeapi.com/ - Performance Monitoring API, checks ping, dns etc
- https://rollbar.com/ - Exception and error monitoring, free plan - 5000 errors/month, unlimited users, 30 days retention.
- https://bugsnag.com/ - Free for up to 2000 errors a month after the initial trial
- https://airbrake.io/ - Automatically groups, organizes and notifies you about your application errors. Free plan - 7200 errors/day, 1 user, 1 project, 2 day retention.
- http://getsentry.com/ - Sentry tracks app exceptions in realtime, has a small free plan. Free, unrestricted use if self-hosted.
- https://www.algolia.com/ - Hosted search-as-you-type (instant). Free hacker plan up to 1,000 documents and 50,000 operations. Bigger free plans available for community/open source projects.
- https://swiftype.com/ - hosted search solution (API and crawler). Free for a single search engine with up to 1000 documents. Free upgrade to Premium level for open-source projects.
- https://bonsai.io/ - Free 1GB memory and 1GB storage.
- http://www.searchly.com/ - Free 2 Indices and 5MB storage.
- https://facetflow.com/ - Hosted Elasticsearch for Microsoft Azure. Free 5000 docs / 500 MB
- http://indexisto.com/ - Site search reinvented. Free 10,000,000 document index limit with advertisement block.
- http://www.sparkpost.com/ - First 10,000 emails per month are free
- http://www.mailgun.com/ - First 10,000 emails per month are free
- http://mailchimp.com/ - 2,000 subscribers and 12,000 emails per month are free
- https://sendloop.com/ - 2,000 subscribers and 10,000 email delivery every month is free
- http://sendgrid.com/ - 400 emails per day for free/25,000 free transactional emails per month for emails sent from a Google compute instance or Microsoft Azure App Service
- http://mandrill.com/ - First 2,000 emails are free
- https://www.phplist.com/ - Hosted version allow 300 mails per month for free
- https://www.mailjet.com/ - 6000 mails per month for free
- https://www.sendinblue.com/ - 9000 mails per month for free
- https://mailtrap.io/ - fake SMTP server for development, free plan with 1 inbox, 50 messages, no team members, 2 emails/sec, no forward rules
- https://mailstache.io/ - 4 Mailboxes @ 1GB each for up to 2 custom domains.
- https://postmarkapp.com/ - First 25,000 emails are free
- https://www.zoho.com/mail/ - Free Email management and collaboration for up to 10 users.
- https://domain.yandex.com/domains_add/ - Free email&dns hosting for up to 1000 users.
- http://moosend.com/ — Mailing list management service. Free account for 6 months for startups.
- https://debugmail.io/ - Easy to use testing mail server for developers.
- http://www.cloudflare.com/ - Basic service is free, good for a blog, Cloudflare also offers a free SSL certificate service
- http://www.bootstrapcdn.com/ - CDN for bootstrap, bootswatch and font awesome
- https://surge.sh/ - Zero-bullshit, single–command, bring your own source control web publishing CDN.
- https://cdnjs.com/ - CDN for JavaScript libraries, CSS libraries, SWF, images, etc!
- http://www.jsdelivr.com/ - super-fast CDN of OSS (JS, CSS, fonts) for developers and webmasters, accepts PRs to add more
- https://developers.google.com/speed/libraries/ - The Google Hosted Libraries is a content distribution network for the most popular, open-source JavaScript libraries.
- https://www.asp.net/ajax/cdn - The Microsoft Ajax Content Delivery Network (CDN) hosts popular third party JavaScript libraries such as jQuery and enables you to easily add them to your Web application
- https://toranproxy.com/ - Proxy for Packagist and GitHub. Never fail CD. Free for personal use, 1 developer, no support.
- http://rawgit.com/ - free limited traffic, serves raw files directly from GitHub with proper Content-Type headers.
- https://www.incapsula.com/ - free CDN and DDoS protection
- https://www.fastly.com/ - Free CDN, all features until 50$/m is reached, enough for most, then pay or suspended.
- http://ddos-protection.io/ - Free DDoS protection with unlimited websites.
- https://www.section.io/ - A simple way to spin up and manage a complete Varnish Cache solution. Supposedly free forever for one site.
- https://www.netdepot.com/cdn/ - First 100 GB free per month.
- http://restlet.com/products/apispark/ - APISpark enables any API, application or data owner to become an API provider in minutes via an intuitive browser interface.
- https://cloud.google.com/appengine/ - Google App Engine gives 28 instance hours free, 1Gb NoSQL Database and more.
- https://www.engineyard.com/ - Engine Yard provides 500 free hours
- http://azure.microsoft.com/ - MS Azure gives $200 worth of free usage for a trial
- http://hpcloud.com/ - $300 credit over 90 days.
- https://appharbor.com/ - A .Net PaaS that provides 1 free worker
- https://shellycloud.com/ - Platform for hosting Ruby and Ruby on Rails apps. Shelly Cloud gives €20 free credit
- https://www.heroku.com/ - Host your apps in the cloud, free for single process apps
- https://www.firebase.com/ - Build realtime apps, free plan has 100 Max Connections, 10 GB Data Transfer, 1 GB Data Storage. 1 GB Hosting Storage and 100 GB Hosting Transfer.
- https://bluemix.net/ - IBM PaaS with a monthly free allowance
- https://www.openshift.com/ - Red Hat PaaS, free tier provides three small gears (each with 512MB memory, 1GB storage). {Browse one-click deployments}.
- https://algorithmia.com/ - Host algorithms for free - includes 10,000 credits (seconds of on-demand execution time) free
- https://bigml.com/ - Hosted machine learning algorithms. Unlimited free tasks for development, limit of 16MB data per task
- https://www.activestate.com/stackato/ - Enterprise-hardened Cloud Foundry PaaS from ActiveState, for private, public and hybrid cloud, free up to 20GB
- http://www.outsystems.com/ - Enterprise web development PaaS for on-premise or cloud, free "personal environment" offering allows for unlimited code and up to 1GB database.
- https://platform.telerik.com/ - Build and deploy mobile applications using Javascript. Free plan has 100 MB Data Storage, 1GB File storage, 5GB Bandwidth, 1 million push notifications for BaaS offering, 100 active devices for analytics.
- http://scn.sap.com/docs/DOC-56411 - The in-memory Platform-as-a-Service offering from SAP. Free developer accounts come with 1GB structured, 1GB unstructured, 1GB of Git data and allow you to run HTML5, Java and HANA XS apps.
- https://www.mendix.com/ - Rapid Application Development for Enterprises - Unlimited number of free sandbox environments supporting 10 users, 100MB of files and 100MB database storage each.
- https://www.pythonanywhere.com/ - cloud Python app hosting. Beginner account is free - one Python web applications at your-username.pythonanywhere.com domain, 512MB private file storage, one MuSQL database.
- https://www.tutum.co/ - The Docker Platform for Dev and Ops - Build, deploy, and manage your apps across any cloud - free while in beta and free developer plan when tutum will be production ready
- http://www.configure.it/ - Mobile app development platform, free for 2 projects, limited features but no resource limits
- https://stamplay.com/ - 50k API calls, 100 GB data transfer, and 1 GB storage for free
- http://qtcloudservices.com/products/managed-runtime/ - Managed platform with micro runtime instance and database for free
- http://elastx.com/start/easypaas/ - Free tier with up to 4 "cloudlets". Must be renewed every year.
- https://viaduct.io/ - 350 MB of RAM and a 1 GB database for free
- http://pagodabox.io/ - Small worker, web server, cache, and database for free
- https://www.cloudandheat.com/en/paas.html - 128 MB of RAM for free, includes support for custom domains for free
- http://apigee.com/docs/api-baas (product docs), http://apigee.com/docs/developer-vs-edge (registration) - Unlimited trial includes NoSQL data store with 25GB of storage, user and permission management, geolocation, 10,000,000 push notifications per month, remote configuration, beta and A/B split testing, APM, fully API driven. Accessible and manageable via UI, SDK, and API.
- http://appacitive.com/ - Mobile backend, free for the first 3 months with 100k API calls,Push notifications.
- https://bip.io/ - A web-automation platform for easily connecting web services. Fully open GPLv3 to power the backend of your open-source project. Commercial OEM License available.
- https://www.blockspring.com/ - Cloud functions. Free for 5 million runs a month.
- https://www.contentful.com/ - Content as a Service. Content Management & Delivery APIs in the cloud. 3 users, 3 spaces (repositories) and 1,000,000 API requests per month for free.
- http://www.kinvey.com/ - Mobile backend, starter plan has unlimited requests per second, with 2 GB of data storage, as well as push notifications for up 5,000,000 unique recipients. Enterprise application support.
- http://konacloud.io/ - Web and Mobile Backend as a Service, with 5 GB free account.
- https://layer.com/ - The full-stack building block for communications.
- https://www.parse.com/ - Mobile backends, free plan has 30 requests per second, with 20 GB of file and database storage, as well as push notifications for up to 1,000,000 unique recipients.
- http://quickblox.com/ - A communication backend for instant messaging, video and voice calling, and push notifications
- https://pushbots.com/ - Push notification service. Free for up to 1,500,000 push/month.
- http://www.dreamfactory.com/ - DreamFactory is an open source backend platform that provides all of the RESTful services you need to build fantastic mobile and web applications
- https://www.mashape.com/ - API Marketplace And Powerful Tools For Private And Public APIs. With the free tier, some features are limited such as monitoring, alerting and support.
- https://onesignal.com/ - Unlimited free push notifications
- https://getstream.io/ - Build scalable newsfeeds & activity streams in a few hours instead of weeks, free for 3 million feed updates / month.
- https://tyk.io/ - API management with authentication, quotas, monitoring, and analytics. Free cloud offering.
- http://www.iron.io/ - Async task processing (like AWS Lambda) with free tier and 1 month free trial.
- http://stackhut.com/ - Async task processing (like AWS Lambda). 10 free private services and unlimited free public services.
- https://www.simplybuilt.com/ - SimplyBuilt offers free website building and hosting for open source projects (http://www.simplybuilt.com/explore/free-websites-for-open-source-projects). Simple alternative to GitHub Pages.
- http://www.devport.co/ - Turn GitHub projects, Apps, and websites into a personal developer portfolio.
- https://www.netlify.com/ - Builds, deploy and hosts static site or app, free for 100 MB data and 1 GB bandwidth.
- https://divshot.com/ - Static Web Hosting for Developers, free basic apps, 1 GB bandwidth, 100 MB storage, custom domains, subdomain SSL.
- https://pantheon.io/ - Drupal and WordPress hosting, automated DevOps, and scalable infrastructure. Free for developers and agencies.
- https://www.acquia.com/free - Hosting for Drupal sites. Free tier for developers. Free development tools (such as Acquia Dev Desktop) also available.
- https://www.bitballoon.com - BitBalloon offers hosting for static sites and apps. Free on a subdomain.
- https://freedns.afraid.org/ - Free DNS hosting
- https://dns.he.net/ - Free DNS hosting service with Dynamic DNS Support
- https://readthedocs.org/ - Free documentation hosting with versioning, PDF generation and more.
- http://aws.amazon.com/free/ - AWS Free Tier - Free for 12 months
- https://exoscale.ch/ - Free resources for Open Source projects
- https://developer.rackspace.com/ - Rackspace Cloud gives $50/month for 12 months
- https://cloud.google.com/compute/ - Google Compute Engine gives $300 over 60 days
- https://cloud.google.com/container-engine/ - Google Container Engine for run Docker containers(Alpha). Pricing: same of Google Compute Engine.
- https://nsone.net/ - Data Driven DNS, automatic traffic management, 1M free Queries
- https://www.cronasaservice.com/ - Hosted cron service (send regular HTTP requests). Unlimited free cron jobs.
- http://www.virtzone.net/ - Free VPS. You must meet certain minor qualifications.
- https://cloudant.com/ - Hosted database from IBM, free if usage is below $50/month
- https://orchestrate.io/ - 1 application free
- https://redislabs.com/redis-cloud - Redis as a Service (30 mb & 30 concurrent connections free)
- https://www.backand.com/ - Back-end as a service (for AngularJS)
- http://www.zenginehq.com/ - Build business workflow apps in minutes - free for single users
- https://parsehub.com/ — Extract data from dynamic sites, turn dynamic websites into APIs, 5 projects free.
- https://import.io/ - Easily turn websites into APIs, completely free for life.
- https://kimonolabs.com/ - "Turn websites into structured APIs from your browser in seconds", free for public APIs, up to 20 million pages fetch / month. Supports scheduling, JSON, CSV, post-auth, ...
- https://redsmin.com/ - Online real-time monitoring and administration service for Redis, 1 Redis instance free
- http://graphstory.com/ - GraphStory offers Neo4j (a Graph Database) as a service
- http://www.elephantsql.com/ - PostgreSQL as a service (20mb free)
- http://www.graphenedb.com/ - Neo4j as a service (up to 1,000 nodes and 10,000 relations free)
- https://mongolab.com/ - MongoDB as a service (500mb free)
- https://scalingo.com/ - Primarily a PaaS but offers a 512 MB free tier of MySQL, PostgreSQL, or MongoDB
- https://skyvia.com/ - "Cloud data platform". Offers a free tier and all plans are completely free while in beta.
- https://pusher.com/ - Hosted Web Sockets broker. Free for up to 20 simultaneous connections and 100k messages a day.
- stun:stun.l.google.com:19302 - Google STUN
- stun:global.stun.twilio.com:3478?transport=udp - Twilio STUN
- https://www.segment.com/ - Hub to translate and route events to other third party services. 100k events a month free.
- https://ngrok.com/ - expose locally running servers over a tunnel to a public URL
- https://www.cloudamqp.com/ - RabbitMQ as a Service. Little Lemur plan: max 1M message per month, max 20 concurrent connections, max 100 queues, max 10,000 queued messages, multiple nodes in differen AZ's.
- https://www.bitrix24.com/ - Free intranet & project management tool
- https://www.pivotaltracker.com/community/public-projects - Pivotal Tracker. Free for public projects.
- https://www.atlassian.com/opensource/overview - Free Jira etc for Open Source projects
- http://kanbantool.com/ - Kanban board based project management. Free (paid plans with more options).
- https://kanbanflow.com/ - Board based project management. Free (premium version with more options).
- https://kanbanpad.com/ - Board based project management. Free (premium version with more options).
- https://kanbanery.com/ - Board based project management. Free for 2 users (premium tiers with more options).
- https://zenhub.io/ - The only project management solution inside GitHub. Free for public repos, OSS, and non-profits.
- https://trello.com/ - Board based project management. Free
- http://www.fogcreek.com/fogbugz/ - Bug Tracking & Project Management. Free for 2 users.
- https://waffle.io/ - Board based project management solution from your existing GitHub Issues. Free for open-source.
- https://huboard.com/ - Instant project management for your GitHub issues. Free for open-source.
- https://taiga.io/ - Project management platform for startups and agile developers. Free for open-source.
- https://www.jetbrains.com/youtrack/buy/open_source_incloud.jsp - Free hosted YouTrack (InCloud) for FOSS projects (private projects free for 10 users: https://www.jetbrains.com/youtrack/buy/)
- https://github.com/ - In addition to its git storage facility, github offers basic issue tracking
- https://asana.com/ - Free for private project with collaborators.
- http://www.acunote.com/ - Free project management and SCRUM software for up to 5 team members.
- http://gliffy.com/ - Online diagrams: flowchart, UML, wireframe... Also Plugins for Jira & Confluence. 5 diagrams and 2 MB free.
- https://cacoo.com/ - Online diagrams in real time: flowchart, UML, network. Free max. 15 users/diagram, 25 sheets.
- https://www.draw.io/ - Online diagrams stored locally, in Google Drive, OneDrive or Dropbox. Free for all features and storage levels.
- https://hub.jazz.net/ - IBM Bluemix's project management services. Free for public projects, free for up to 3 users for private projects.
- http://leankit.com/ - Kanban board, that visualizes your workflow. Free up to 10 users.
- https://www.visualstudio.com/products/what-is-visual-studio-online-vs - Unlimited free private code repositories; Tracks bugs, work items, feedback and more.
- https://testlio.com/ - Issue tracking, test management and beta testing platform. Free for private use.
- https://www.vivifyscrum.com/ - Free tool for Agile project management. Scrum Compatible.
- http://www.targetprocess.com/ - Visual project management, from Kanban and Scrum to almost any operational process. Free for unlimited users, up to 1000 data entities (more details at http://www.targetprocess.com/pricing/).
- https://overv.io/ - Agile project management for teams who love GitHub.
- https://taskulu.com/ - Role based project management. Free up to 5 users. Integration with Github/ Trello/ Dropbox/ Google Drive.
- https://www.aerofs.com/ - P2P file syncing, free for up to 30 users
- http://cloudinary.com/ - Image upload, powerful manipulations, storage, and delivery for sites and apps, with libraries for Ruby, Python, Java, PHP, Objective-C and more. Perpetual free tier includes 7500 images/month, 2gb storage, 5gb bandwidth.
- https://plot.ly/ - graph and share your data. Free tier includes unlimited public files and 10 private files.
- https://transloadit.com/ - Handles file uploads & encoding of video, audio, images, documents. Free for open source & other do-gooders. Commercial applications get the first GB free for test driving.
- https://podio.com/ - You can use Podio with a team of up to five people and try out the features of the Basic Plan - except User Management.
- https://shrinkray.io/ - free image optimization of Github repos
- http://imagefly.io/ - Responsive images on-demand. CDN-fronted image resizing, transcoding, and optimizing. 100 MB/month for free.
- https://kraken.io/pro - Image optimization for website performance as a service - free plan up to 1MB filesize
- https://placehold.it/ - A quick and simple image placeholder service.
- https://placekitten.com/ - A quick and simple service for getting pictures of kittens for use as placeholders.
- http://placepenguin.com/ - A quick and simple service for placeholder images of penguins.
- http://embed.ly/ - Provides APIs for embeding media in a webpage, Responsive image Scaling, Extracting elements from a webpage. Free for up to 5,000 URLs per Month at 15 Requests per Second
- https://backhub.co/ - Backup and archive your GitHub repositories. Free for public repos.
- http://www.otixo.com/ - Encrypt, share, copy and move all your cloud storage files from one place. Basic plan provides unlimited files transfer with 250 MB max file size limit and allows 5 encrypted files.
- Pixlr - Free online browser editor on the level of commercial ones
- Imagebin - Pastebin for images
- Cloudconvert - Convert anything to anything. 208 supported formats including videos to gif.
- App Icon Resizer - A simple service to resize and manage your app icons.
- http://geocod.io/ - Geocoding via API or CSV Upload. 2.500 free queries per day.
- http://gogeo.io/ - Maps and geospatial services with an easy to use API and support for big data
- https://cartodb.com/ - Create maps and geospatial APIs from your data and public data.
- http://www.giscloud.com/ - Visualize, analyze and share geo data online.
- https://www.mapbox.com/ - Maps, geospatial services, and SDKs for displaying map data.
- https://build.opensuse.org/ - package build service for multiple distros (SUSE, EL, Fedora, Debian etc.)
- https://copr.fedoraproject.org/ - mock-based RPM build service for Fedora and EL
- https://help.launchpad.net/Packaging - Ubuntu and Debian build service
- https://c9.io/ - IDE in a browser. Incorporates an Ubuntu virtual machine and in-browser terminal access. Integrates with github and bitbucket, but also adds SFTP and generic Git access.
- https://codeanywhere.com/ - Full IDE in the browser and mobile apps. Access FTP, SFTP, Dropbox, Google Drive, GitHub, and BitBucket. Hosted virtual machines with terminal access. Collaboration features like share links, live editing, permissions, and version tracking.
- https://codenvy.com/ - IDE and automated developer workspaces in a browser, collaborative, git/SVN integration, build and run your app in customizable Docker-based runners (free tier includes: 4GB RAM, always-on machines, ability to run multiple machines simultaneously), pre-integrated deploy to Google Apps.
- https://koding.com/ - IDE in a browser. Features: Full sudo access - VMs hosted on Amazon EC2 - SSH Access - Real EC2 VM, no LXCs/hypervising - Custom sub-domains - Publicly accessible IP - Ubuntu 14.04 - IDE/Terminal/Collaboration
- https://www.nitrous.io/ - Private Linux instance(s) with interactive collaboration, free for 2 hours a day. {More Details}
- http://visualstudio.com/free - Fully-featured IDE with thousands of extensions, cross-platform app development (Microsoft extensions available for download for iOS and Android), desktop, web and cloud development, multi-language support (C#, C++, JavaScript, Python, PHP and more).
- https://cloud.sagemath.com/ - Collaborative mathematics-oriented IDE in a browser, with support for Python, LaTeX, IPython Notebooks, etc.
- https://wakatime.com/ - quantified self metrics about your coding activity, using text editor plugins - Limited plan for free.
- https://apiary.io/ - Collaborative design API with instant API mock and generated documentation (Free for unlimited API blueprints and unlimited user with one admin account and hosted documentation)
- https://www.mockable.io/ - Mockable is a simple configurable service to mock out RESTful API or SOAP web-services. This online service allows you to quickly define REST API or SOAP endpoints and have them return JSON or XML data.
- https://www.jetbrains.com/products.html - Productivity tools, IDEs and deploy tools. Free license for students, teachers, open source projects, and user groups.
- https://readme.io/ - Beautiful documentations made easy - free for Open Source
- https://codio.com/ - Codio is a cloud-based computer programming platform for universities, schools, and developer professionals.
- http://www.stackhive.com/ - Cloud based IDE in browser that supports HTML5/CSS3/jQuery/Bootstrap
- http://www.tadpoledb.com/ - IDE in browser Database tool. Support Amazon RDS, Apache Hive, Apache Tajo, CUBRID, MariaDB, MySQL, Oracle, SQLite, MSSQL, PostgreSQL and MongoDB databases.
- https://www.sourcelair.com/ - In-browser IDE for Django, JavaScript, HTML5, Python, and more. Integrates with Git, Mercurial, GitHub, Heroku and more. Free forever for 1 private project.
- https://codepen.io/ - CodePen is a playground for the front end side of the web.
- https://www.librato.com/ - Event/Data collection service with analysis and graphs. Limited plan for free.
- https://www.google.com/analytics/ - Google Analytics
- https://heapanalytics.com/ - Automatically captures every user action in iOS or web apps. Free for up to 5,000 visits per month.
- http://sematext.com/search-analytics - Free for up to 50K actions/month, 1 day data retention, unlimited dashboards, users, etc.
- https://usabilityhub.com/ - Test designs and mockups on real people, track visitors. Free for one user, unlimited tests.
- https://gosquared.com/ - Track up to 1,000 data points for free.
- https://mixpanel.com/ - Free 25000 points or 200000 with their badge on your site.
- https://amplitude.com/ - 1 million monthly events, up to 2 apps.
- https://keen.io/ - Custom Analytics for data collection, analysis and visualization. 50,000 events/month free
- https://parse.com/ - Unlimited free analytics
- http://www.inspectlet.com/ - 100 sessions/month free for 1 website
- https://www.mousestats.com/ - 100 sessions/month free for 1 website
- https://metrika.yandex.com/ - Unlimited free analytics
- https://www.hotjar.com/ - Per site: 2000 page views/day, 3 heatmaps, data stored for 3 months...
- http://imprace.com/ - Landing page analysis with suggestions to improve bounce rates. Free for 5 landing pages per domain.
- https://www.cognalys.com/ - Freemium mobile number verification through an innovative and reliable method than using SMS gateway. Free accounts will have 70 Tries and 50 verifications per day. {Signup}
- https://www.braintreepayments.com/ - Credit Card, Paypal, Venmo, Bitcoin, Apple Pay (, ...) integration. Single and Recurrent Payments. First $50 are free of charge.
- http://taxratesapi.avalara.com/ - Get the right sales tax rates to charge for the close to 10,000 sales tax jurisdictions in the USA. Free REST API. Registration required.
- https://education.github.com/pack - As long as you're a student at a recognized university or US high school
- https://quay.io/ - Unlimited free public repositories
- https://www.tutum.co/ - The Docker Platform for Dev and Ops - Build, deploy, and manage your apps across any cloud - free while in beta and free developer plan when tutum will be production ready
- https://atlas.hashicorp.com/boxes/search - HashiCorp's index of boxes
- http://vagrantbox.es/ - An alternative public box index
- http://www.monkeylearn.com/ - Text mining in the cloud, 1,000 queries for free per month.
- https://wit.ai/ - NLP for developers
- https://www.wolfram.com/language/ - Built-in knowledge based algorithms in the cloud
- https://github.com/httpsGithubParty/FOSS-for-Dev - A hub of Free and open-source software for developers
- https://github.com/pborreli/free-for-nonprofit - List of free services for non-profit organisations
- https://www.fullcontact.com/developer/pricing/ - Help your users know more about their contacts by adding social profile into your app. 500 free Person API matches per month.