What are some useful programs for Linux that do not install during the installation?

I am running Fedora 7 on 1 computer and Fedora 10 on another.

I am new to Linux so any advice is welcomeWhat are some useful programs for Linux that do not install during the installation?
What kind of things are you looking for? There are tons of small apps out there, everything from comic book readers to databases to games.



Things I generally install (I'm using Ubuntu but these should work on Fedora):



Thunderbird

Firefox

Gimp

Inkscape

Scribus

OpenOffice

Banshee

Audacity

Calibre

VLC