A modern, cross-platform Quake game engine based on FitzQuake.
Odamex is a free, cross-platform, modern client-server Doom engine
A cross-platform port of Hexen II game.
GemRB is a portable open-source implementation of the Infinity Engine
WW2 U-boat simulation
Hardcore 3D space shooter with spaceship upgrade possibilities.
inputbox password WIN OSX GTK QT Console VCPKG C# Lua R Fortran Pascal
functions for 2D/3D graphics + realistic driving simulation
Cross-platform real-time strategy game (3D)
Video mixer for mixing live and recorded video and audio feeds
Free MMORPG
3D-Accelerated open-source DOOM engine
3D driving simulation based on Open Dynamics Engine
3D Charts - Templates for PovRay(TM)
Audio spectrum visualiser in 3D for Linux
Atari 2600, C64, Python, 3D engines and rock'n roll