A modern, cross-platform Quake game engine based on FitzQuake.
For exploring cellular automata like Conway's Game of Life.
Colonize the New World.
Good-looking and addictive OpenSource games
Seven Kingdoms: Ancient Adversaries
4X Space Strategy Game
Odamex is a free, cross-platform, modern client-server Doom engine
Open and edit the archive files used in over 5700 games.
Realism Invictus mod for Civilization IV
The Sokoban game implemented in Java.
xBRZ: "Scale by rules" - high quality image upscaling filter by Zenju
GemRB is a portable open-source implementation of the Infinity Engine
Final Fantasy VIII Save Editor
C64/Amiga emulator with shader and runAhead
A cross-platform port of Hexen II game.
Domination is a game that is a bit like the board game Risk