BSON 4 Jackson (Java)

ebson (Java)

Retrofit samples

Retrofit Einführung (EN)

Find a Jar by class name

SimpleXML - Lightwight XML parser, suitable for Android

Custom Fonts in Android App einbinden (en)

Google Material Design Icons (CC-BY)

Drag, Drop and Swipe with Recycler View w/o external library

Probalby some faster way of reading all contacts (SO)

New permission management with Android 6

Android rooten (Computer Woche)

Android Weather app using Yahoo weather provider

Yahoo Weather Java Example

Sample for location and geo coding using Rx Java

Style Gentrator for Android UI Elements

App (and Source) for calculation of sunset and sunrise etc.

Android Annotations (DI Injection at compiletime)

Article about image processing with canvas that does cover the porter duff modes (e.g. multiply)

Custom Attributs gut erkärt (SO)