After searching the internet extensivly in search of freeware here are my findings:

System tune-Up:
CCleaner
Glary utilities
Defraggler
Regscrub XP

Word prossessor:
Openoffice
abiword

Spreadsheet:
Gnumeric

Games:
Supertux
Alien arena
Blobwars

Widgets/desktop apps:
Yahoo widgets
Google desktop
Konfabulator (now yahoo widgets)
Music players:

itunes
Media monkey (free adition)
Windows media player skins
Vlc (more of a media player)
Media player classic
Win amp

Pictures viewers/ organisers:
Picasa + photo viewer

Web browsers:

Firefox

Opera

Seamonkey
SUPER media converter – converts just about anything to anything!
The fore [...]