0 A.D. is a free, open-source, cross-platform real-time strategy game.
0 A.D. (pronounced "zero ey-dee") is a cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of ancient civilizations, each depicted at their peak of economic growth and military prowess.
The OpenRTSS project aims at producing a free gameengine for making "Real-Time Strategy Shooters". The engine is written using Unity for simplicity and fast development.
[Project Dormant until 2008]Shadows Rising is a browser based RPG written in PHP, Javascript, and XHTML. MySQL/PostgreSQL supported. The core engine will allow users create unique RPGs by adding new items, classes, terrain maps to Game Modules.
FrakTal's objective is to create a gameengine and a default game implementation of an innovative real-time strategy game concept in Far west environment. The main idea is that the player can customize his character to let him some autonomy.