ThinkPHP Framework
Self-hosted CMS platform based on the Laravel PHP Framework
Arianne is an engine to develop multiplayer online games like Stendhal
JavaScript framework to build game engines, games, emulators and apps
The first-ever RPG for WordPress
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Create symmetric sprites: browse, save to PC, or store online
Free strategy browsergame engine.
Modular Gaming Open Source Persistent Browser Based Game Framework
CLM for Joomla! 1.5 + 2.5
Moteur de jeux de rôles descripifs (RP) en PHP
Create your own online real-time browser-based MMO in your website
Zap Engine
Atlarius is no longer under development.
Andruill Engine is a GMS (Game Management System) written in PHP.