Thing is with software these days theres not much point because most things have a just as good freeware/opensource version available anyway.
Free -
Filezilla (Alternative to something like cuteFTP and better),
Winamp (What else does anyone need for music),
BSPlayer (Better than WMP imo),
Openoffice (I never need to make office documents only view them),
Thunderbird (I prefer to outlook),
Firefox (Prefer to IE),
Audiograbber (Rip Cd's [that you legally have]),
Quicktime, Realplayer etc all free
The only programs you mite want that are not free are -
Windows (Comes free on most computer),
Nero (Comes free with most burners),
Dreamweaver,
Photoshop,
Etc etc etc