Been dedicating some free time from my weekends to sending PRs the DarkRadiant project: https://github.com/codereader/DarkRadiant

DarkRadiant is open source, cross platform level editor for The Dark Mod and other idTech4 games like Doom 3, Quake 4 and Prey. It is a lot of fun to add features that make level designers more productive. I would like to invite anyone that is curious about wxWidgets, CSG and game dev to join us.

If you are a designer, we could definitely use a new icon set.