GemRB is a portable open-source implementation of the Infinity Engine
Arianne is an engine to develop multiplayer online games like Stendhal
Cooperative multiplayer graphical RPG and adventure game
KildClient is a powerful MUD client with a built-in Perl interpreter
Ze Text Adventure game Builder : Create as you play !
General Purpose Engine for Graphic Adventures.
Open-source reimplementation of the original King's Bounty
Cross-platform dice roller for multiple RPG systems.
BattleTech MUX Client
The first-ever RPG for WordPress
A port of uMoria as a BBS door
A roguelike, contains binaries and source packages for
These tools make running a Wesnoth MP server on Linux easier
Classic Rogue-Like for Synchronet BBS's
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons