AOMEI PE Builder - Free tool to create bootable USB drive, CD/DVD or ISO file based on Windows PE.
Autoruns - See what programs are configured to startup automatically when your system boots and you login.
Hirens BootCD - Hirens BootCD is a powerful, all-in-one boot disk utility that will help you resolve and make reformatting your computer easily.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
UBCD4Win - "UBCD4Win is a bootable recovery CD that contains software used for repairing, restoring, or...
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.