1)   Systerac Tools for Vista Beta 4.00
An incredible package of tools for Windows 7, Windows Vista and Windows XP that will improve your PC performance, speed up your programs and Internet connection, diagnose pc problems and tweak your Vista PC for optimal results.

 2)   7Tweak 1.8
An all-in-one utility suite to tweak, optimize, tune and clean up your Windows 7, it bundles a lot of different utilities and helps your system to run faster, more stable, secure and personal!