The quadplay fantasy console
Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
0 A.D. is a free, open-source, cross-platform real-time strategy game.
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
An online multiplayer real time strategy game
X3D Prototypes for the SMUOS Component
PHP/MySQL/JS free multiplayer browser-based online game about tanks
Multiplayer online game using Phaser + WebSocket (Socket.IO)
Massively multiplayer online game server and client framework
JAVA websocket implementation for a bomberman-like game
Counter-Strike Global Offense Web Administration
WebSockets based 2D / 3D multiplayer action game
A open-source online football manager like hattrick
Free MMORPG Engine. Develop and host graphical browser-based games.