This program is the only reason I can be bothered ripping my entire CD collection; it is literally set and forget. It uses all the existing applications I already know how to use, but I can organise everything how I want. It's a shell script too, so I can hack if I wanna :-) And I can ask to edit the playlist before using it, because there are a lot of shitty CDDB entries out there... I can't think how this program could be better.
An open, cross-platform journaling program.
A scientific plotting package.