Introduction

Hi, I’m Robert Eisele. 👋 Your sponsorship allows me to dedicate more time to open-source projects that empower developers, engineers, and creators worldwide.

Since 2008, I’ve contributed to dozens of projects and released tools you might already be using without realizing it! My work spans mathematics, programming utilities, and foundational libraries that simplify complex computations and make coding a joy.

Whether you’re building database applications, solving challenging mathematical problems, or exploring new ideas, my open-source contributions are here to help.

Why Sponsor Me?

If you’ve ever used open-source tools like Fraction.js, Complex.js, GPS.js, or Quaternion, you’ve benefited from my work. I’m deeply passionate about creating libraries that save time, simplify workflows, and make advanced concepts accessible to all.

Much of my development happens in my free time, often nights and weekends. While I’ve been fortunate to balance this alongside other commitments, making open-source sustainable is always a challenge.

Your sponsorship not only supports the ongoing maintenance of these projects but also enables me to explore new ideas and develop tools for the future. If my work has saved you hours, streamlined your projects, or simply inspired you, I’d be honored if you’d consider supporting it.

Projects

My open-source libraries and tools are trusted by developers, data scientists, and educators worldwide. They’re used in fields ranging from robotics and software engineering to education and scientific computing.

Major Projects

• Fraction.js: Precise fractional arithmetic in JavaScript.
• Complex.js: A library for working with complex numbers.
• Quaternion: Simplified quaternion math for 3D rotations.
• BitSet: High-performance bit manipulation.
• GPS.js: Parse and handle GPS data easily.
• DHCP.js: A DHCP server written in JavaScript

Other Notable Work

• Node.js user since day one, after I hacked v8 into PHP before.
• Write and share mathematical insights on raw.org.
• Development of handy tools on raw.org.
• Former contributor to PHP.

Looking Ahead

From numerical computation libraries to exploring new areas like robotics and geometry, there’s so much more to come.

Thank You!

Thanks so much for considering my work and for supporting open source. 🙏 If you’d like to collaborate, sponsor a feature, or discuss a different project, feel free to reach out via xor.de.