Grisoft AVG Antivirus - a free antivirus program. No registration required to use it

Lavasoft Ad-Aware - Anti-Spyware and Malware removal

Spybot - Search & Destroy - Anti-Spyware and Malware  removal

Mozilla Firefox - an alternative browser to Internet Explorer

Adobe Acrobat Reader - required for viewing .pdf files

Apple Quicktime - useful for viewing files with the .mov extension