Freeware: Spyware removal

Ad-aware - http://www.lavasoft.de/software/adaware/
Bazooka - http://www.kephyr.com/spywarescanner/index.html
CWShredder - http://www.intermute.com/products/cwshredder.html
Hijackthis - http://www.spywareinfo.com/~merijn/downloads.html
Microsoft AntiSpyware - http://www.microsoft.com/athome/security/spyware/software/default.mspx
SpyBot Search & Destroy - http://spybot.safer-networking.de/
SpywareBlaster - http://www.javacoolsoftware.com/spywareblaster.html
SpywareGuard - http://www.wilderssecurity.net/spywareguard.html
WinPatrol - http://www.winpatrol.com/