Apache NetBeans

etBeans IDE is an integrated, multi-platform and open-source development environment for Java that is also compatible with other programming languages like Ruby or C . NetBeans IDE doesn't just allow you to design and program desktop applications; you can also use it to make Internet applications that use AJAX, CSS, and Javascript. With NetBeans IDE you can compile and debug your programs as well as control file versions thanks to CVS, Mercurial, or Subversion. It also includes a tool to generate UML models that explain the functioning of the software under development.