Europa Universalis 4 save game editor
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Open source FPS/RTS Game
Open source revival of the game Transarctica / Arctic Baron
Java RTS framework
Modification for Age of Empires III
An online multiplayer tactical warfare game for fast action combat!
ASCII based browser tower defense game
Free strategy browsergame engine.
A powerful chess engine written in C++
Evaluates Starcraft 2 games with respect to multiple macro aspects.
This is simple 10-level game to entertain as long as you wish it to.