Parking Panda is a prepaid parking reservation service that is available in major cities and allows you to prepay for parking at lower prices than the drive-up rates.
Updated 12/16/2014: From now through December 31, 2014, new Parking Panda customers can get $15 in free credits to use toward your first parking reservation. Get a $5 Parking Panda Credit when you create a new account via this referral link, and then get $10 off your next in-app reservation with Code APP10 when you download and use the Parking Panda app to book a reservation by December 31, 2014. If you already have a Parking Panda account, you can still get the $10 credit for using their app for the first time.
More Parking Service Free Credits