Arx Libertatis is a cross-platform, open source port of Arx Fatalis, a 2002 first-person role-playing game developed by Arkane Studios. Arx Fatalis features crafting, melee and ranged combat, and a unique casting system where the player draws runes in real time to effect the desired spell. The Arx Libertatis source code is based on the publicly released Arx Fatalis sources. This does however not include the game data, so you need to obtain a copy of the original Arx Fatalis or its demo.
RPGRobotAlive is an aide to a role playing games. It displays a board with walls and representations of the players that you can move around the dungeon. You can also place treasure or monsters in the dungeon. The program only keeps track of the locations of things, so you have to apply the rules of the game yourself to determine what happens in an encounter between the players and the contents of the dungeon. This software is generic and can be helpful with many different kinds of role playing games.