Winaero Tweaker - Universal tweaker software which supports Windows 7, Windows 8, and Windows 8.1.
7+ Taskbar Tweaker - 7+ Taskbar Tweaker allows you to configure various aspects of the Windows taskbar.
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
TaskbarX - TaskbarX gives you control over the position of your taskbar icons.
GIGATweaker - GIGATweaker is a powerfull and compact application that allows you to optimize and tweak your OS.
TranslucentTB - TranslucentTB make Windows Taskbar transparent