This project includes a Crawler that collects informatiom from all nodes in the Bitcoin Protocol. The DNS portion of the repository utilizes the IP Addresses found by the Crawler to build a dynamic Nameserver that is capable of providing 25 randomly selected IP's of well connected nodes. Such a Nameserver is used by Bitcoin-Core for the DNS Seeding portion of the node initialization.
My personal DNS Seeder can be found at seed.convex.city. I have a fork of bitcoin-core here that utilizes this DNS Seeder rather than the standard Core Developer supplied seeders.
Check out the seeder by using one of the following commands:
host seed.convex.city
dig seed.convex.city