I couldn't live without:
Borland Delphi
ACDSee32 v2.14
RealDRAW Pro
Axialis IconWorkshop
Winamp
BSPlayer
MSN Messenger + Plus!
WinHTTrack
SmartFTP
GetRight
MailWasher
Microsoft Office
CDex
Tag&Rename
Easy CD Creator
VMWare
WinRAR
PowerToys for Windows XP
Rainlendar
SpyBot
SpywareBlaster
SpywareGuard
Maybe that's why reinstalling Windows takes me so long