Status Item Checker 1.1Free
Status Item Checker is a tool for developers to test and compare status items.
With this app, you're able to compare up to 3 status items at the same time. You can simply drag a status item image to field 1, 2 or 3 and the status items in the menubar will update instantly. If you only want to test 1 item, you can delete the other status items.
In the preferences you can also enable "Highlighted Mode" for each item, so you can see how the items will look in your application.