Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
Eduflow - Digital learning that actually teaches students something
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.
Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Flowlingo - Get fluent in a language through content immersion