Shortlist thanks!
I've long been a fan of Brasero, DropBox, and the Terminal com-line, and recently discovered Lucky Backup (best of its breed). Pithos is new to me, but it installed easily (Ubuntu 10.4/LL-LTS) and works great! My own contributions to "small apps I can't live without": GRsync (my mainstay before LuckyB, still a compliment), Klipper (multi-use cut-&-paste), KRename (batch file renamer), Qalculate! (great little calculator, lots of functionality), Shutter (screenshots), Sound Juicer (CD ripper), Sound Converter (audio file format converter), EasyTAG (view/edit MP3, OggV, FLAC, etc. tags), UNetbootin (Live USB drive creator).
Of course, Linux/FLOSS is rich with small/tiny programs of great utility, and I'm always finding new ones... that's half-the-fun.
