1)   eBoostr 2
eBoostr brings the Vista's ReadyBoost benefits onto Windows XP machines. It allows you to use an additional drive, such as flash memory or hard disk, as another performance-boosting memory caching mechanism for speeding up your OS and applications.

 2)   Innovative System Optimizer 3.0
This powerful PC optimizer helps you increase the performance and responsiveness of your Windows Vista or XP system by using many tools which optimize key areas of Windows operation.

 3)   SpeedOptimizer 3.0.9.5
SpeedOptimizer 3 optimizes your Network & Internet connections. The latest version expands SPO to a suite of tools, designed to optimize and fix problems in your registry, temp. Files folder, and system settings as well.