RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.

Bind Android views and callbacks to fields and methods.

Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

The Physical Web: walk up and use anything

Context sensitive notifications for Android

Insanely easy way to work with Android Database.

Android OpenGL ES 2.0/3.0 Engine

An interactive indicator to navigate between the different pages of a ViewPager

Migrated:

Visual back-port of the rotating drawer-to-arrow drawable from Android L

Migrated:

A sensor dashboard for Android plotting all sensor data of your Android wearable.

Android Bootstrap

Spark Android App

Native Android app that I use to monitor the temperature and humidity of my home.

A simple app to test Android's AsyncTask behaviour (serial vs parallel execution)