Parking in Amsterdam is a pain. It involves walking up to a parking pole, and entering your car license plate with a single dial. It also only accept coins, or chipknip (which nobody uses). So I decided to go with a parking company which allowed you to park your car by sms or using their app. However, I quickly found out that this was not ideal either...
There are multiple parking provides like these, ParkMobile and Yellowbrick being the biggest. I however had once decided to use a smaller one called smsparking.nl. It turned out their app was not really nice to use: it was dead slow and locked up my phone. So, as a side project, I started to build my own parking app, using the API of smsparking.nl.
I reverse-engineerde the API that smsparking.nl used and built an initial version. Gradually I improved upon it, learning more about Android in the meantime. Currently it's pretty feature-complete, even including a map view to easily spot the parking poles.
The project is open source and released on Github under the MIT license.