Arianne is an engine to develop multiplayer online games like Stendhal
The first-ever RPG for WordPress
Online WFRP V2 Character Generator
Alpha One is based on Vallheru
Immersive and expansive hardcore old-school 2D ORPG (MMORPG)
Anarchy Online Emulator
Online Zombie Game is a medieval-zombie apocalypse rpg game.
3D urban environment renderer : browser-app ; as well as a GTA clone
Star Trek Web browser game
XMICAE is a framework for browser-based IF/RPG narratives.
Spenser's The Faerie Queene: module adventure for Neverwinter Nights 2
A Fun Little RPG Game Written in HTML5
Rolemaster Combat program
NinYawg Adventure
Board and web browser MMORPG
WhiteDogRPG is A-PHP-RPG engine.