Useful Free and Open Source Software

Image editing - http://www.irfanview.com/
Audio Editing - http://audacity.sourceforge.net/
PDF Creation - http://www.cutepdf.com/products/cutepdf/Writer.asp
USB Boot Tools - http://sites.google.com/site/rmprepusb/
Recovery Tools - http://www.ubcd4win.com/index.htm
Remote Desktop Software - http://www.teamviewer.com/en/download/tv6.aspx
ISO Burning Software - http://www.freeisoburner.com/
AntiVirus - http://www.microsoft.com/en-gb/security_essentials/Default.aspx
Virus Removal 32 / 64 bit 'Offline' - http://connect.microsoft.com/systemsweeper
Virus Removal - http://www.microsoft.com/security/scanner/en-us/default.aspx
Windows 7 / Vista Tweaker - http://www.winvistaclub.com/Ultimate_Windows_Tweaker.html
Photoshop Alternatives - http://www.paint.net/