OBS Studio - Free and open source software for live streaming and screen recording

stb single-file public domain libraries for C/C++

A library for high-performance, modern 2D graphics with SDL written in C.

A collaborative drawing program

The Multimedia Presenter for Lua (for commercial projects, use info-beamer pi instead)

gravity cave-exploration game (SF-Cave goes 3D)

send a mousewheel up/down event from the shell (for laptops without touchpads and mouseless people in general)