Free and Open Source, Distributed, RESTful Search Engine

Google core libraries for Java

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

Tools to work with android .dex and java .class files

Free implementation of Play Services

Redis Java client

A simple expressive web framework for java. Spark has a kotlin DSL https://github.com/perwendel/spark-kotlin

A damn simple library for building production-ready RESTful web services.

Socket.IO server implemented on Java. Realtime java framework

Use SQL to query Elasticsearch

Runtime code generation for the Java virtual machine.

High-quality QR Code generator library in Java, TypeScript/JavaScript, Python, Rust, C++, C.

Asynchronous Http and WebSocket Client library for Java

Apache Kafka® running on Kubernetes

Unified Queries for Java

Java runtime metadata analysis

Fork of tagtraum industries' GCViewer. Tagtraum stopped development in 2008, I aim to improve support for Sun's / Oracle's java 1.6+ garbage collector logs (including G1 collector)

The official AWS SDK for Java 1.x (In Maintenance Mode, End-of-Life on 12/31/2025). The AWS SDK for Java 2.x is available here: https://github.com/aws/aws-sdk-java-v2/

Kafka GUI for Apache Kafka to manage topics, topics data, consumers group, schema registry, connect and more...

Real-time transport layer for Java AI agents. Build once with @Agent — deliver over WebSocket, SSE, gRPC, and WebTransport/HTTP3. Talk MCP, A2A and AG-UI.

High performance non-blocking webserver

Backport of Java 8's lambda expressions to Java 7, 6 and 5

An uber-fast parallelized Java classpath scanner and module scanner.

Logback JSON encoder and appenders

Access other storage backends via the S3 API

Dozer is a Java Bean to Java Bean mapper that recursively copies data from one object to another.

JPHP - an implementation of PHP on Java VM

This is mavenised Luke: Lucene Toolbox Project

Snappy compressor/decompressor for Java

Compare JSON in your Unit Tests