VisualVM is an All-in-One Java Troubleshooting Tool
Apache NetBeans
PDFsam, a desktop application to split, merge, mix, rotate PDF files
Advanced manager and monitor for Apache Tomcat
A Java Virtual Machine for OpenJDK
TestNG testing framework
Hibernate's core object/relational mapping functionality
The modern Essentials suite for Spigot and Paper
High-level Deep Learning Framework written in Kotlin
The Enterprise-ready testing and specification framework
Enhancing Java Stream API
A library of material components for JavaFX
Kotlin wrappers for popular JavaScript libraries
A Minecraft plugin API
Alibaba Dragonwell8 JDK
A tool for static analysis to look for bugs in Java code
Apache InLong - a one-stop integration framework for massive data
Replacement for the Java date and time classes prior to Java SE 8
Exposing the JDK Flight Recorder as a Spring Boot Actuator Endpoint
Laravel Dusk provides simple end-to-end testing and browser automation
Authentication and access-control framework
BotCity Framework - Open Source RPA
Framework for application developers to use state machine concepts
Alpakka is a Reactive Enterprise Integration library for Java
Provides support to increase developer productivity in Java