Jump Lists are a new concept in Windows 7 that allow developers to provide shortcuts for users right from their icon's context menu in the taskbar or Start menu. The shortcuts could be simple links to the documents folder or a library for a given application, or links back to the same application with a parameter passed to cause something to happen.
Taskbar Classic Start Menu adds to the system notification area an icon.
XNeat Windows Manager adds additional functions to your taskbar and system tray.
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