Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

Free and Open Source, Distributed, RESTful Search Engine

All Algorithms implemented in Java

Ghidra is a software reverse engineering (SRE) framework

Spring Framework

Google core libraries for Java

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

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

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A browser automation framework and ecosystem.

Open Source Identity and Access Management For Modern Applications and Services

Mirror of Apache Kafka

Learn System Design concepts and prepare for interviews using free resources.

Telegram for Android source

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

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

JDK main-line development https://openjdk.org/projects/jdk

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

Learn Low Level Design (LLD) and prepare for interviews using free resources.

RxJava bindings for Android

IntelliJ IDEA & IntelliJ Platform

A fast dependency injector for Android and Java.

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

Graphs for Everyone

Apache Hadoop

Quarkus: Supersonic Subatomic Java.

Apache Doris is an easy-to-use, high performance and unified analytics database.

Awesome LeetCode resources to learn Data Structures and Algorithms and prepare for Coding Interviews.

🏗 Build container images for your Java applications.

Apache ZooKeeper