AndroidAnnotations is an Open Source framework that speeds up Android development. It takes care of the plumbing, and lets you concentrate on what's really important. By simplifying your code, it facilitates its maintenance.
Simple Android color picker with color wheel and lightness bar.
A simple API Wrapper of OpenWeatherMap.org for Android. It uses Retrofit 2.0 and currently supports 5-Day Forecasts and Current Forecast for any Lat/Lon given location.