7 Taskbar Tweaker

This programs enables you to tweak your Windows 7 taskbar. The tweaks are divided into three sections:
Taskbar items: control taskbar items related stuff, like middle/right clicking, hovering, dropping, etc.
Grouping and combining: disable grouping, allow to drag windows between groups, force/disable combining, etc.
Other taskbar options: mouse wheel options, double/middle clicking on the empty space of the taskbar, and misc.

Taskbar Inspector

A tool that allows you to:
- Configure labeling/grouping/combining per Application ID.
- Reorder items within a tab group (drag’n'drop).
- Close/minimize/etc. multiple windows at once.
- Change Application ID of windows (that is, grouping whatever windows you want).
You can open it from the tweaker main window, from it’s tray menu, or optionally by double/middle clicking the empty space of the taskbar.

Reference:
http://rammichael.com/7-taskbar-tweaker