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.
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Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
Apache Beam is a unified programming model for Batch and Streaming data processing.
A damn simple library for building production-ready RESTful web services.
Java interface to OpenCV, FFmpeg, and more
Modifications to the Minecraft base files to assist in compatibility between mods. New Discord: https://discord.minecraftforge.net/
:chart_with_upwards_trend: Capturing JVM- and application-level metrics. So you know what's going on.
An annotation processor for generating type-safe bean mappers
Learning RxJava for Android by example
The modern Java bytecode editor
A tool for mocking HTTP services
Catch common Java mistakes as compile-time errors
Bootstrap style widgets for Android, with Glyph Icons
Java DSL for easy testing of REST services
High-quality QR Code generator library in Java, TypeScript/JavaScript, Python, Rust, C++, C.
jOOQ is the best way to write SQL in Java
Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.
Shattered Pixel Dungeon is an open-source traditional roguelike dungeon crawler with randomized levels and enemies, and hundreds of items to collect and use. It's based on the source code of Pixel Dungeon, by Watabou.
Gephi - The Open Graph Viz Platform
Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.
Asynchronous, non-blocking HTTP & WebSocket client for the JVM
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.