The Quantum Game Library (QGL) for PHP aims to centralise common game elements in a component library. Includes Map Computations for Grid/Hex maps, pluggable map generator, ArtificialIntelligence algorithms, plugin system and more. Or it will :).
CrimeFighter is the website of a gta-like browser game with rpg and multiplayer parts. Moreover you can see yourself running around in the city in realtime. Never seen such a online game? Just visit http://www.crimefighter.de
Scripter is the core scripting engine of the latest Diabloworld project, JED, created by Ben Thompson (smoke). The purpose of this project is to build and provide a solid scripting engine for Diablo II.