FNordApp is a project mainly written in Java, it's free.
Mobile fNordApp
Readme for fNordApp
COMPILING:
1: install Android SDK
2: create a signing key: see http://developer.android.com/guide/publishing/app-signing.html#cert for more information
3: edit sdk.dir in local.properties file to fit your sdk location.
4: edit build.properties to your needs
5: type: ant release
This will compile and create an apk archive. It will be in bin/fNordeingang-release.apk