Help out your favorite open source projects and become a better developer while doing it.

Open Source, Distributed, RESTful Search Engine

Free and Open, Distributed, RESTful Search Engine

Apache Beam is a unified programming model for Batch and Streaming data processing.

OsmAnd

Free universal database tool and SQL client

Quarkus: Supersonic Subatomic Java.

The official home of the Presto distributed SQL query engine for big data

🔎 Open source distributed and RESTful search engine.

Style and Grammar Checker for 25+ Languages

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

Open Source Identity and Access Management For Modern Applications and Services

Ghidra is a software reverse engineering (SRE) framework

Magic Another Game Engine

Apache Flink

A lightweight Youtube frontend for Android.

📱 Nextcloud Android app

Apache Hadoop

Spring Security

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

WordPress for Android

Apache NetBeans

Very spicy additions to the Java programming language.

K-9 Mail – Advanced Email for Android 📧

A JavaScript checker and optimizer.

Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services

Dubbo is a high-performance, java based, open source RPC framework

The java implementation of Apache Dubbo. An RPC and microservice framework.

Microsoft Azure SDK for Java

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a comma

The ZAP core project

c:geo - The powerful Android geocaching app.