When your Mac computer has any problems or hick-ups with either Finder or Dock, e.g. the annoying download bar that stays visible under your "downloads" folder after the download is complete, or local networking problems within Finder, simply click on the app icon and your Finder and Dock will restart immediately.
Download the .zip file, unpack it and copy the content in your Applications folder. It's also convenient to keep it in your Dock for quick acces. It looks pretty good too;)
Compatible with OS X 10.6+
The app is utterly harmless, but nevertheless usage is at your own risk.