I have only played Dungeons and Dragons 3.0 but was looking to upgrade to Dungeons and Dragons 3.5 and was wondering if there is any free or cheap (that is, a lot less than $50) software tools or websites that can help manage the game for a DM. I would like recommendations for both 3.0 and 3.5, but I kind of need it to be idiot-proof or at least have an instruction manual.
Ideally, what I'm looking for helps the DM create fully-statted monsters and NPCs and includes enough information so that the DM doesn't have to flip through a stack of books constantly during play.