GemRB is a portable open-source implementation of the Infinity Engine
Orx: Portable Game Engine
A strategy game with a high fantasy theme
Odamex is a free, cross-platform, modern client-server Doom engine
Cross-platform, GPL reimplementation of the classic : Syndicate
inputbox password WIN OSX GTK QT Console VCPKG C# Lua R Fortran Pascal
Vtech Creativision and clones. CSL, Salora Manager, Laser 2001
a (simple) Sokoban game
Cross-platform real-time strategy game (3D)
A shooter game.
Ur-Quan Masters High Definition
Cross Platform GUI Toolkit
3D driving simulation based on Open Dynamics Engine