WinTools.net is software which can tweak Windows functionality.
Microsoft Windows contains many different hidden functions for all versions which have been released until now. This includes Windows XP tweaking, Windows Vista tweaking and Windows 7 tweaking programs.
This list contains some of the programs which get into the nitty gritty of the Windows registry and modifies the way Windows acts. Thankfully, you're not required to search out the settings yourself while these programs offer a user interface to many common modifications.