Free and open source real-time strategy game
A game engine with an emphasis on real-time cutting-edge solutions
Realism Invictus mod for Civilization IV
An enhanced version of 7K:AA (Seven Kingdoms: Ancient Adversaries).
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Battle for Wesnoth is a turn based fantasy strategic game
An online multiplayer tactical warfare game for fast action combat!
Turn based Civ-like strategy game
An experimental strategy game made out of basic UI elements
A fantasy real time multiplayer strategy game with player scripted AI
A mobile tower 3D tower defense/defend the flag game
A UnitEditor that can be modified to match exactly the requirements...