VisualVM is an All-in-One Java Troubleshooting Tool
Desktop/Android/HTML5/iOS Java game development framework
Apache Log4j 2 is a versatile, feature-rich, efficient logging API
Java bytecode engineering toolkit
Application Performance Monitoring System
SoapUI is a free and open source cross-platform functional testing
Open-source code analysis platform for C/C++/Java/Binary/Javascript
Make writing Java http clients easier
A fast JSON parser/generator for Java
The OWASP ZAP core project
A process for exposing JMX Beans via HTTP for Prometheus consumption
ORCID Open Source Project
iText for Java represents the next level of SDKs for developers
Visualizes all aspects of compiled Java class files
Ad-Free, New Features & Freedom
Distributed tracing system to gather timing data
Skript is a Bukkit plugin which allows server admins
New additions to the Java programming language
ProGuard, Java optimizer and obfuscator
A Java math library for OpenGL rendering calculations
Apache Maven core
A set of tools that keep Java sweet
A free and open development kit for the Sega Mega Drive
Browser automation framework and ecosystem
Comprehensive programming and configuration model for modern apps