1)   Systerac XP Tools 4.03
Systerac XP Tools are an amateur and professional's tool for optimizing windows xp performance, identify problems and bottlenecks and make sure that your PC is running at top efficiency and speed. Tweak your XP for optimal results.

 2)   Systerac Tools for Vista Beta 4.00c
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.