ToolBar Extras is a set of apps that adds a little more functionality to your Finder windows. Take a look at the screenshot to see how I have set it up on my machine.
There is a 30 launch limit on most apps, but some are free. Purchase it to unlock them all forever!
Click "More Information" to see the details.
Note: To add them to the toolbar, just drag the app to the toolbar, wait maybe three seconds and you will notice that you can now drop it there.
- Lock.app - select a file or folder and click "Lock.app" to lock or unlock it. If no finder item is selected, it will work on the current open more...
- Snow Leopard Support