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

RxJava bindings for Android

A fast dependency injector for Android and Java.

An Android library for managing images and the memory they use.

Realm is a mobile database: a replacement for SQLite & ORMs

Fast Android Development. Easy maintainance.

An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.

A barebones WebSocket client and server implementation written in 100% Java.

Paging indicator widgets compatible with the ViewPager from the Android Support Library and ActionBarSherlock.

DEPRECATED

A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages.

A Material Design ViewPager easy to use library

Annotation-triggered method call logging for your debug builds.

Android and Java bytecode viewer

A list of useful Java frameworks, libraries, software and hello worlds examples

A sample Android app which showcases advanced usage of Dagger among other open source libraries.

A small Android library allowing you to have a smooth and customizable horizontal or circular indeterminate ProgressBar

A simple, annotation-based library for making deep link handling better on Android

Google Guice on Android, version 3.0 [RETIRED]

Android StackBlur is a library that can perform a blurry effect on a Bitmap based on a gradient or radius, and return the result. The library is based on the code of Mario Klingemann.

📦 Android Parcelables made easy through code generation.

Dynamic iOS-like blur of underlying Views for Android

ANDROID. ChipsLayoutManager (SpanLayoutManager, FlowLayoutManager). A custom layout manager for RecyclerView which mimicric TextView span behaviour, flow layouts behaviour with support of amazing r…

A library that extends the Android toast framework.

Command-line tool to count per-package methods in Android .dex files

A Real-Time Audio Processing Framework in Java

An android library for displaying fps from the choreographer and percentage of time with two or more frames dropped

A better calendar for Android

A GridView which can addHeaderView and addFooterView

StandOut lets you easily create floating windows in your Android app.