Humans vs. Zombies is a live-action game played all over the world. An engine for playing the game is hosted by Gnarwhal Studios.
At the time, using the engine (Karl vs. Zombies engine at the time) was only available through the browser. There was no mobile version of the web app and no mobile app. It was tedious to use in quick/large games.
I figured that I could create an Android app to allow for simple interfacing (reporting a bite, etc). Cue "Humans and Zombies" (they would not let me use their trademark for the app).
I worked with Gnarwhal to implement a small, secure API for the Karl vs. Zombies engine that they would host for all of their hosted games. I got a simple app to work, and ~1000 people downloaded it. Cool stuff at the time.
Unfortunately, I didn't have the time to upkeep the app and the engine changed into the new HvZ source engine ran through Django. The API changed, and my app was crumy. So I took the app off the Android Market and abandoned the project.