RocketDock - RocketDock is a Mac OS X dock clone.
7+ Taskbar Tweaker - 7+ Taskbar Tweaker allows you to configure various aspects of the Windows taskbar.
ObjectDock - ObjectDock is the most popular animated dock for Windows.
TaskbarX - TaskbarX gives you control over the position of your taskbar icons.
XWindows Dock - We've seen a lot of docks for Windows in our day, and they're usually not very good. We regarded XWindows Dock first with skepticism, then with guarded.
TranslucentTB - TranslucentTB make Windows Taskbar transparent