Design patterns implemented in Java

Free and Open Source, Distributed, RESTful Search Engine

Google core libraries for Java

Free universal database tool and SQL client

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.

Render After Effects animations natively on Android and iOS, Web, and React Native

An image loading and caching library for Android focused on smooth scrolling

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

Apache Kafka - A distributed event streaming platform

Telegram for Android source

Bind Android views and callbacks to fields and methods.

a fast, scalable, multi-language and extensible build system

Desktop/Android/HTML5/iOS Java game development framework

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

A fast dependency injector for Android and Java.

Tinker is a hot-fix solution library for Android, it supports dex, library and resources update without reinstall apk.

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

Powerful and flexible library for loading, caching and displaying images on Android.

Most popular Mocking framework for unit tests written in Java

A circular ImageView for Android

Apache Druid: a high performance real-time analytics database.

✔️ Simple, pretty and powerful logger for android

Very spicy additions to the Java programming language.

Guice (pronounced 'juice') is a lightweight dependency injection framework for Java 11 and above, brought to you by Google.

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

greenDAO is a light & fast ORM solution for Android that maps objects to SQLite databases.

Cute view animation collection.