wxWidgets - wxWidgets: Cross-Platform GUI Library
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
Electron - Build cross platform desktop apps with web technologies
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.
BlueJ - BlueJ is an Integrated Development Environment for Java, developed mainly for educational purposes...