Free and Open Source, Distributed, RESTful Search Engine

Ghidra is a software reverse engineering (SRE) framework

Free universal database tool and SQL client

Dex to Java decompiler

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

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

Desktop/Android/HTML5/iOS Java game development framework

High Performance Inter-Thread Messaging Library

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

Zipkin is a distributed tracing system

A standalone Java Decompiler GUI

Logstash - transport and process your logs, events, or other data

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

Your Cheat Sheet For Android Interview - Android Interview Questions and Answers

Free implementation of Play Services

OpenRefine is a free, open source power tool for working with messy data and improving it

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

An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.

Continuous Inspection

Views and Drawable for displaying animated GIFs on Android

Flyway by Redgate • Database Migrations Made Easy.

Java Native Access

Distributed and fault-tolerant realtime computation: stream processing, continuous computation, distributed RPC, and more

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

Use SQL to query Elasticsearch

Runtime code generation for the Java virtual machine.

Gephi - The Open Graph Viz Platform

Main Liquibase Source

Open-Source Subscription Billing & Payments Platform

Vitamio for Android