unDock is a menu item that places an "unDock Now!" command that ejects all drives connected to your Mac. If a Time Machine backup is occurring, it will safely cancel the backup and eject the disk.
When you're ready to go, use either the keyboard shortcut (default: Control-Option-Command-Space) or the menu bar icon to unDock. All removable disks will instantly be ejected. You can also supply your own AppleScripts that will be run when unDock is triggered.
Updated on Jan 28 2015
Note: Now requires a 64-bit Intel processor.