some of these arent free, but easily attainable off torrent
cyberlink powerDVD - dvd player
Sonic MyDVD - burn videos of any format to a DVD format you can watch on your television
CloneDVD - copying DVD's, i mean backing up dvd's you already have

quicktime - a must have
nero - data/mp3/audio cd burner
powerISO - great for burning images (.bin and .cue files)
daemon tools - great virtual drive simulator
DivX player - plays damn near any viedo format
WinAVIVideoConverter - converts videos to different video formats
NetAnts - download manager (easily ftp's imbedded video and audio files)
XP Codec Pack 2.0.4 -a must have for any video player
easy CD-DA Extractor - best cd ripper I have used
Lavasoft Ad-Aware
Spybot Search & Destroy
Registry Mechanic
XoftSpy
BitComet
Zsnesw - best super nintendo emulator
Project64 - best nintendo64 emulator
WinRAR - great for compressing and decompressing files
tunebite - good for recording drm encrypted audio files into non-encrypted mp3 files
Nestopia - pest nintendo emulator