Utilities

Anti virus: AVG anti virus
Anti virus: Trend Micros' free online virus scanner
Spyware remover: Lavasoft AdAware
Spyware remover: Spybot Search & Destroy
Adobe Acrobat viewer
Windows update
MS Office update
Winzip
ZoneAlarm firewall

Telephony

Cheap alternatives to Premium and National rate numbers
Cheap international calls 1
Cheap international calls 2

Communications

MSN Messenger
Skype

Alternatives to Internet Explorer

Firefox
Opera
Netscape Navigator