I've been having great fun coding up a utility for the new Traveller rules this past month or so, and a similar thread over on RPG.net has prompted me to wonder how we could more effectively make use of computers to enrich our tabletop roleplaying. I'm not just thinking about utilities like battle-boarders or chat programs that could be used during play, but also resource creation utilities that could be used to assist in the creation of things like scenarios, maps, character concepts and that kind of thing. So...

1) What kind of system-specific software would you find useful?