Odamex is a free, cross-platform, modern client-server Doom engine
GemRB is a portable open-source implementation of the Infinity Engine
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)
3D driving simulation based on Open Dynamics Engine
3D Charts - Templates for PovRay(TM)
a very lightweight advanced terrain-rendering and 3D map rendering sys
A cross-platform, 3D interpreter to play LucasArts' Lua-based games
An advanced flexible game engine for Java.
action/combat flight sim
A 2D Adventure Game & Engine
Three dimensional first-person space deathmatch!
collection of illustrative programs:small games, simulators: C, Matlab