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.

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

A Java serialization/deserialization library to convert Java Objects into JSON and back

RxJava bindings for Android

Implementation of ImageView for Android that supports zooming, by various touch gestures.

SmartTube - an advanced player for set-top boxes and tvs running Android OS

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

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

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

Ultra Pull to Refresh for Android. Support all the views.

Custom fonts in Android the easy way...

A library for debugging android databases and shared preferences - Make Debugging Great Again

Android view for displaying PDFs rendered with PdfiumAndroid

Android library (AAR). Highly configurable, easily extendable deep zoom view for displaying huge images without loss of detail. Perfect for photo galleries, maps, building plans etc.

The usual Toast, but with steroids 💪

A fast ImageView that supports rounded corners, ovals, and circles.

A Material design back port of Android's CalendarView

A scrollable list of items that centers the current element and provides easy-to-use APIs for cool item animations.

[DEPRECATED] An Android library which allows developers to easily add animations to ListView items

An android library for section headers that stick to the top

Android library that simplifies the process of requesting permissions at runtime.

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.

Android USB host serial driver library for CDC, FTDI, Arduino and other devices.

Password manager app for Android

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

[DEPRECATED] Android library for using the Honeycomb animation API on all versions of the platform back to 1.0!

Standalone Android widget for picking a single date from a calendar view.

A TextView that automatically resizes text to fit perfectly within its bounds.