GemRB is a portable open-source implementation of the Infinity Engine
iRPGUnit Testing for RPG Developers on IBM i
A minimal wxWidgets wrapper for VR capable UI based on GLUI.
The first-ever RPG for WordPress
2D Game Engine
A fast, scalable, distributed game server engine/framework for C++
Development of a plugin based dev tool for RPG Maker
plugin-based RPG manager in C++ and Qt5
Hitman Bukkit Plugin by Arasus
Extended functions for the New Vegas Script Extender
AOnow winamp plugin for Anarchy Online and Age of Conan
A tool for roleplaying gamemasters
HeroCraft Abilities Using the CraftBukkeit Plugin