Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
Unity Tweak Tool - Unity Tweak Tool is a settings manager for the ...
Winaero Tweaker - Universal tweaker software which supports Windows 7, Windows 8, and Windows 8.1.
dconf Editor - dconf is a low-level configuration system. Its main purpose is to provide a backend to GSettings on platforms that don't already have configuration storage system.
Sysinternals Suite - The Sysinternals Troubleshooting Utilities have been rolled up into a single Suite of tools.
GIGATweaker - GIGATweaker is a powerfull and compact application that allows you to optimize and tweak your OS.