Free for a limited time (regularly $0.99) is an app that counts down the time remaining on your parking meter. Within the app you can select predefined time limits, or enter your own. You can also drop a pin on the location of your vehicle in case you have trouble finding it.
Check out the app, Parking Meter Pro, at the following iTunes stores.
For all other countries visit the developer’s website.
And hey, if it doesn’t work for you, it’s free!