Software

Anti-Virus

• Microsoft Security Essentials
• Avast

Anti-Spyware

• Malwarebytes
  
• SuperAntiSpyware
  

Browser Add-ins

• WOT – Web of Trust

Repair Systems

• Windows Repair (All In One)
• Complete Internet Repair

Office Application

• OpenOffice – Word processor, spreadsheet, presentation and drawing

Backup Solution

• SyncBack

Utilities

• ComboFix
• Windows Sysinternals
• TrueCrypt
• CDBurnerXP – Great DVD/CD Copy program
• TFC – Temp File Cleaner by OldTimer 
• CCLeaner
• TreeSize Free

Portable Applications

• Portable Apps
• Portable Freeware Collection
• Tiny Apps

Podcast Clients

• Ziepod
• iTunes

BitTorrent Clients

• Azureus – Java client
• BitComet – Full P2P client
• uTorrent – Small but good

Multimedia Player

• VLC media player – highly portable multi-format player

DVD

• DVD Decrypter – Use this to copy DVD movie to your hard drive
• DVD Shrink – Use this software to shrink the movie to a 4.7 GB DVD and/or create an ISO.
• Daemon Tools – Create virtual drives by mounting a CD or DVD ISO image

CD

• CDex – CD audio ripping tool

Audio

• Audacity – Sound editing software for cross-platforms
• dBpowerAmp – Convert your audio files to any format