NetBeans - The Only IDE You Need

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 out of the box and runs on many platforms including Windows, Linux, Mac OS X and Solaris.

The NetBeans IDE 6.1 release provides several new features and enhancements, such as rich JavaScript editing features, support for using the Spring web framework, and tighter MySQL integration. This release also provides improved performance, especially faster startup (up to 40%), lower memory consumption and improved responsiveness while working with large projects.