Lacking Natural Simplicity

OpenRPG is a client server application for playing table-top roleplaying games over the Internet. It runs on Windows, Mac OS X, and various other versions Unix. It provides interactive chat with integrated dice rolling, a simple map display, game server browsing, and a tree-structured data organizer for character sheets, setting information, adventures, and so forth. It's a bit rough around the edges, but it's certainly functional enough to be useful.