Arianne is an engine to develop multiplayer online games like Stendhal
Cross-platform, GPL reimplementation of the classic : Syndicate
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
oGame-like browser space realtime strategy game based on xNova
A game engine in java for 2D strategy games