Apache NetBeans
Completely customizable framework for building rich text editors
Programmer-friendly testing framework for Java and the JVM
A high velocity web framework
ProGuard, Java optimizer and obfuscator
TestNG testing framework
tinylog is a lightweight logging framework for Java, Kotlin, Scala
MyBatis SQL mapper framework for Java
Pure Java annotation, single class file, rapid development
Test Anything Protocol tools for node
Framework for building GraalVM-enabled command line apps
A scalable web crawler framework for Java
Simple and powerful Unity3d game workflow!
Provides support to increase developer productivity in Java
Simplifies the development of creating a JPA-based data access layer
Cross-platform C++ library for use as a default application framework.
Visual HTML page editor that renders real HTML and CSS
Lightweight embeddable code editor Web Component with syntax highlight
SDL library for Android, including several games.
iDempiere. Community Powered Enterprise
the java game and entertainment runtime
Java-based Open Source extensible ESB