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.
Kano - The educational computer and coding kit for all ages
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.
Harry Potter Kano Coding Kit - Build a wand. Learn to code. Make magic.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
PictoBlox - Coding for kids: Program robots. Make games. Do much more.