Arianne is an engine to develop multiplayer online games like Stendhal
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Total War Savegame Editor / Parser
RTSish Game Engine
These tools make running a Wesnoth MP server on Linux easier
A space race game in the style of A Dark Room
Open-source 3D RTS game inspired by the Dungeon Keeper series
A fantasy real time multiplayer strategy game with player scripted AI
Unique web based space strategy game written by Andras Nemeth
Cross platform 2D game creation framework with Python bindings
PHP Multiplayer Chess Script
RTS RPG hybrid game with realistic army and combat management.
A RPG Text-Based Command Prompt Game by Takaya Sato
Programming-game written in Lua