Free and open source real-time strategy game
Odamex is a free, cross-platform, modern client-server Doom engine
0 A.D. is a free, open-source, cross-platform real-time strategy game.
NetChess to play between two players over net or internet
Cross-platform real-time strategy game (3D)
The Free & Popular Community git Server in a Complete Virtual Machine
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Educational tool for simulating supply chain competition
Multiplayer Pac-Man game via LAN
An online multiplayer tactical warfare game for fast action combat!
A turn-based 4X strategy game set in space
Mighty 34th century meka action from TeamXbow
Networked Jeopardy game
The SCND Genesis: Legends
Dueling Simulator for the Yu Gi Oh TCG