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

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

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

RxJava bindings for Android

QuestDB is a high performance, open-source, time-series database

A circular ImageView for Android

The Java gRPC implementation. HTTP/2 based RPC

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

Android library to observe scroll events on scrollable views.

A util for setting status bar style on Android App.

🚀 Ultimate Android Reference - Your Road to Become a Better Android Developer

A Material Design ViewPager easy to use library

Socket.IO server implemented on Java. Realtime java framework

A beautiful, slim Android ProgressBar.

A Material design back port of Android's CalendarView

🚀 A Complete Fast Android Networking Library that also supports HTTP/2 🚀

An implementation of tap targets from the Material Design guidelines for feature discovery.

An easy, flexible way to add a shimmering effect to any view in an Android app.

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

Text editor - Notes & ToDo (for Android) - Markdown, todo.txt, plaintext, math, ..

Set of extra Transitions on top of Jetpack Transitions Library

A library to reproduce the behavior of the Bottom Navigation guidelines from Material Design.

[NeoForge Mod] Building Tools and Aesthetic Technology

Free implementation of Play Services

Android markdown library (no WebView)

Deprecated: The Mobile Vision API is now a part of ML Kit: Check out this repo:

A material designed music player for Android

A library that extends the Android toast framework.

Paper is a fast NoSQL-like storage for Java/Kotlin objects on Android with automatic schema migration support.

A High Dynamic Range (HDR) Histogram