I have a few that aren't anywhere NEAR as "tech-geek-guru" centric.....:
Beesu - I dont evne know what it really IS.....but when I wanted to delete a folder and was gettingt an error message that it was unable to be deleted......moved....etc. I ran this and then it disappeared, I think it's some kind of "Menu Editor" for your Main menu selections that appear when you right-click, because the option to "Change Owner & Permissions" wasn't there UNTIL I ran it!
BleachBit - The best thing for my Fedora 17 machine since the Linux kernel! Everytime I run this app my machine emerges as if it's almost new. It gets rid of a lot of "fluff" that builds up over time.
GParted - The best tool for partitioning hard drives....both internal and network attached....hands down a necessity for any admin's Linux Tool Kit!
ClamAV - It may be hard to get it up & running, but once you do, it helps provide peace of mind just knowing that SOMETHING is minding the store and that no one can just waltz right in unannounced!
Keep Up with TechRepublic