A MUD client for Android, iOS, Linux, Mac OS X and Windows
Warlock is a front end for Simutronics text-based games.
Crossfire RPG Game Weather Patch -- Now a branch on the official repo!
Online Flight Simulation Network Client for X-Plane
Provides a full suite of clients and servers for virtual worlds.
GGMud is a cross platform modern MUD client.
Fast paced action RPG with retro graphics style
A simple telnet (and possibly SSH) server
A simple command line tool that operates on Tibia automap files.