7+ Taskbar Tweaker adds a ton of extra settings and options to the Windows taskbar. It's compatible with Windows 7 and Windows 8. Most of the configuration options it provides can’t be tweaked using the taskbar properties or the registry.
The tweaker is designed for Windows 7 and Windows 8.
Download Portable Version | Website
It's a freeware but you can donate the developer if you like the application.
Video demo