Xslimmer (slims your apps down, saving you space)
Monolingual (removes un-needed language support, giving you allot more space)
Handbrake (rips all copywrite dvd to MP4 format, many encodes)
MacTheRipper (rips all copywrite dvds. maintaining dvd format)
MacPAR deLuxe (rar files, par2)
Senuti (copy any ipod)
OnyX (system performance, maintenance)