Bahá'í Qiblih Locator is the first Android application I have developed. It is a niche application that solves a simple need for the Bahá'í community, namely to know in which direction to turn when saying their obligatory prayer from anywhere in the world. It is a very simple application, yet popular among Bahá'ís around the world.
The code is available under the simplified BSD license at https://github.com/stendardo/qiblih/ and you may download it from the Google play store (https://play.google.com/store/apps/details?id=org.stendardo.bsak.qiblih).