Download of unDock 2.1.2 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this software for Mac is Thomas Metge. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
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 may want to check out more Mac applications, such as Handy Calculator or Shotcut, which might be similar to unDock.