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

Bind Android views and callbacks to fields and methods.

🔥下拉刷新、上拉加载、二级刷新、淘宝二楼、RefreshLayout、OverScroll，Android智能下拉刷新框架，支持越界回弹、越界拖动，具有极强的扩展性，集成了几十种炫酷的Header和 Footer。

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

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

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

A diagram of the Android Activity / Fragment lifecycle

dexposed enable 'god' mode for single android application.

Android open source calendar

Automated testing to find logic and performance bugs in database systems

Yet Another Hook Framework for ART

A CAT called tabby ( Code Analysis Tool )

Android 工程师进阶手册（8 年 Android 开发者的成长感悟）

Android dynamic instrumentation framework

Android diary for any kind of activities

使用Soot进行android应用静态分析

A tool to instrument Android APKs based on Soot