Hirens BootCD - Hirens BootCD is a powerful, all-in-one boot disk utility that will help you resolve and make reformatting your computer easily.
Tron Script - Tron is a glorified collection of batch files that automate the process of cleaning up Windows systems.
Rescatux - Rescatux is a GNU/Linux rescue cd (and eventually also Windows) but it is not like other rescue...
Autoruns - See what programs are configured to startup automatically when your system boots and you login.
Ultimate Boot CD - The last Boot CD you'll ever need. You need the Ultimate Boot CD if you want to:
SKTools - SKTools is a multi-featured and easy-to-use application that is bundled with over 60 tools to help you boost the performance of the system.