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

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

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

RxJava bindings for Android

A fast dependency injector for Android and Java.

Modular and customizable Material Design UI components for Android

A powerful and lightweight plugin framework for Android

Java Native Access

A lightweight wrapper around SQLiteOpenHelper which introduces reactive stream semantics to SQL operations.

Groupie helps you display and manage complex RecyclerView layouts.

Twitter4J is an open-source Java library for the Twitter API.

A Java API to read, write and create MP4 files

Extracts Exif, IPTC, XMP, ICC and other metadata from image, video and audio files

Knife is a rich text editor component for writing documents in Android.

High quality UI controls to complement the core JavaFX distribution

Java framework for the vlc media player

Efficient execution and functional composition of database calls using jdbc and RxJava Observables

Scene Builder is a visual, drag 'n' drop, layout tool for designing JavaFX application user interfaces.

An Android template with navigation drawer for material design

Migrated:

Access network file shares directly from the Android Downloads/Files app

RxJava bindings for JavaFX

Manage your finances on-the-go, encrypted for security, and sync via your storage

An IdlingResource for Espresso which wraps an RxJava Scheduler.

Flutter implementation of Google Mobile Vision.

Gradle plugin for JavaFX

A sample project that shows how Apache POI can be used in an Android application

The java version of Redux : a predictable state container for apps.

Reactive: Examples of the most famous reactive libraries that you can find in the market.

A Java wrapper around the JSON API provided by TheMovieDB.org