Top JAVA GitHub Repositories & Tools (2026)

Common classes used in different Spring Cloud implementations

$mol - fastest reactive micro-modular compact flexible lazy ui web framework.

Java fake data generator

DataWave is an ingest/query framework that leverages Apache Accumulo to provide fast, secure data access.

Datadog APM client for Java

Private NPM Registry for self-host. Example, npm registry Mirror on China https://registry.npmmirror.com

INCEpTION provides a semantic annotation platform offering intelligent annotation assistance and knowledge management.

Jmix framework

Zero-dependency browser video editor that AI agents can drive — JSON timeline, MCP + REST, live-reloading UI

Mirror of Apache Pig

DevoxxGenie is an agentic plugin for IntelliJ IDEA that uses local LLM's (Ollama, LMStudio, GPT4All, Jan and Llama.cpp) and Cloud based LLMs to help review, test, explain your project code. Latest version now also supports Spec Driven Development with CLI Runners.

Java client for NATS

A Java library for building modern terminal user interfaces.

Client library for Amazon Kinesis

This repo contains the curriculum of Techtonica, a tech training program for women and non-binary adults with low incomes.

openHAB client for Android

A web interface for managing SaltStack based infrastructure.

A community project with additional components and extensions for Aspire

📅 Calendar link generator for popular services

Firebase Admin Java SDK