System Explorer is a completely free application which gives you, the Windows user, full power over your system by allowing you to explore to your heart's content. It is a freeware startup management application that's light on system resources, easy to setup, well-designed, easy-to-use and advanced.
Here are some screenshots to illustrate the features and user interface of this application:
SoundSwitch
ParkControl
PowerToys
WinSetView
WinTools.net