Java IDE - Netbeans

Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.

A free, open-source Integrated Development Environment for software developers. You get all the tools you need to create professional desktop, enterprise, web, and mobile applications with the Java language, C/C++, and Ruby. NetBeans IDE is easy to install and use straight [...]

Java IDE - 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.