I agree. A lot of them come with a UNIX system, although there are others. I use some of the moreutils stuff. For email, I use Heirloom-mailx. For text editing,

I agree. A lot of them come with a UNIX system, although there are others. I use some of the moreutils stuff. For email, I use Heirloom-mailx. For text editing, I use vim. For database I use SQLite. For typesetting I use TeX. For processing pictures I implemented my own package called Farbfeld Utilities. For making MOD/XM musics, I wrote AmigaMML which uses a text file rather than the GUI that many other programs do. Hopefully other people on here can mention even more, because I am interested in the answer too, and probably my answer is insufficient to the original asker anyways.