Free and Open Source, Distributed, RESTful Search Engine

Everything you need to know to get the job.

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.

Mirror of Apache Kafka

Apache Flink

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

Jenkins automation server

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…

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

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

IntelliJ IDEA & IntelliJ Platform

High Performance Inter-Thread Messaging Library

Zipkin is a distributed tracing system

A high performance caching library for Java

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

Graphs for Everyone

A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

Vert.x is a tool-kit for building reactive applications on the JVM

Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running mat…

AWS Service registry for resilient mid-tier load balancing and failover.

Redis Java client

The Java gRPC implementation. HTTP/2 based RPC

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

The Clojure programming language

Apache Cassandra®

Java JsonPath implementation

Java Native Access

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