checkstyle / checkstyle
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 command line program.
graphhopper / graphhopper
Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.
apache / camel
Apache Camel is an open source integration framework with 350+ connectors. Write routes in Java, YAML, or XML. Run on Spring Boot, Quarkus, or standalone. Apache License 2.0.
thymeleaf / thymeleaf
Thymeleaf is a modern server-side Java template engine for both web and standalone environments.
OpenLineage / OpenLineage
An Open Standard for lineage metadata collection
dedicatedcode / reitti
Reitti is a comprehensive personal location tracking and analysis application that helps you understand your movement patterns and significant places. The name "Reitti" comes from Finnish, meaning "route" or "path".
itext / itext-java
iText for Java represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enhance PDF documents, iText can be a boon to nearly every workflow.
validator / validator
The Nu Html Checker (vnu)
standard-webhooks / standard-webhooks
The Standard Webhooks specification
higress-group / himarket
HiMarket is an enterprise-level "AI Capability Marketplace and Developer Ecosystem Hub." It is not merely a simple aggregation of traditional APIs, but rather a comprehensive platform that packages, publishes, manages, and operates core AI assets such as enterprise Model APIs, MCP Servers, Agent APIs, etc., through standardized product formats.
jspecify / jspecify
An artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.
microsoft / mssql-jdbc
The Microsoft JDBC Driver for SQL Server is a Type 4 JDBC driver that provides database connectivity with SQL Server through the standard JDBC application program interfaces (APIs).
yahoo / elide
Elide is a Java library that lets you stand up a GraphQL/JSON-API web service with minimal effort.
Igalia / wolvic
A fast and secure browser for standalone virtual-reality and augmented-reality headsets.
cowtowncoder / java-uuid-generator
Java Uuid Generator (JUG) is a Java library for generating all standard UUID versions (v1 - v7)
chatty / chatty
Twitch Chat Client written in Java
miaixzo / bus
Bus (Enterprise Application/Service Bus) is a foundational framework and service suite; a lightweight enterprise-grade application/service framework built on Java 21+, providing standardized service suites and distributed middleware solutions.
adobe / aem-core-wcm-components
Standardized components to build websites with AEM.
ViaVersion / ViaProxy
Standalone proxy which allows players to join EVERY Minecraft server version (Classic, Alpha, Beta, Release, Bedrock)
airlift / aircompressor
A port of Snappy, LZO, LZ4, and Zstandard to Java
plantuml / plantuml-stdlib
Contains official Standard Library for PlantUML
easymock / objenesis
Okay, it's pretty easy to instantiate objects in Java through standard reflection. However there are many cases where you need to go beyond what reflection provides. For example, if there's no public constructor, you want to bypass the constructor code, or set final fields. There are numerous clever (but fiddly) approaches to getting around this and this library provides a simple way to get at them. You will find the official site here.
Erudika / para
Multitenant backend server for building web and mobile apps rapidly. The backend for busy developers. (self-hosted or hosted)
liuxiaoyan199701-coder / jt-vehicle-platform
JT/T 808 & JT/T 1078 vehicle monitoring platform | 部标 808/1078 车联网平台：协议网关 + 业务后端 + 控制台前端 + 浏览器裸流播放器
YeamimHossainSajid / CodeMonk
CodeMonk 🥋 —>An open-source AI powered code intelligence platform that helps developers understand, explore, and navigate complex codebases using modern Spring Boot, Spring AI, RAG, knowledge graphs, and intelligent code analysis
Suz41 / Fishbowl
Standalone Jellyfin Media Server & companion automation suite for Android ARM64.
cagridursun / agentic-developer-handbook
Java-first open-source handbook for understanding and building agentic systems, one concept at a time.