Platform: iOS, Android: Free

Driven to so many places just to turn back around because were short a few bucks for parking? With Parkmobile, you'll be able to pay for public or private parking around D.C. You can register multiple vehicles to one cell phone number, and you'll get a text message reminder to let you know when you have 15 minutes left before your parking expires. Now, don't you wish you had this the other night when you dug around your car for coins when took that chick out?