The Fragsurf source code is now public on Github. You're welcome to reference it, learn from it, copy it, compile it, edit it, spy on it, contribute towards development, and create issues/bug reports. I'm working on some awesome tools for mapping and if you're familiar with Unity you can clone the project and see what's new right now. The modding toolkit is included in the repository but will get its own portable release soon.
I hope this paves a new path for mappers, modders, developers, and the surf & bhop community and opens up opportunity that was never possible (or difficult) in Source Engine to bring surf and bunnyhop to greater heights!
Honestly, I just want to see what type of madness people can come up with given a set of modern and powerful creation tools xD
https://github.com/cr4yz/Fragsurf-2
Thank you everybody for continuing to support Fragsurf, and stay tuned for future updates!