Avast! - antivirus : is free, light program that does its job.
Copywriter - to edit txt and rtf files. I like to work with rtf files to note down stuff and this is a small, fast and easy program to do so.
Limewire - Music downloads
Firefox - Browsing
WinAmp - playing music
AoA audio extractor - sometimes i download youtube vids with keepvid.com, and with this program i can rip the audio to a mp3 file.
ALShow - vieuwing all kinds of movies
Msn Messenger - chat
CCleaner - Cleans up the dirt you leave behind on your pc
Skype - phone
Spybot - search and destroy - just installed this.
SABnzbd - download stuff from newsgroups