The newest version of NetBeans 6.9 supports OSGi, Maven integration and many improvements.
NetBeans 6.9 is now available for download.
The latest, and final major 6.x release of the open source integrated development environment introduces several new features. Now developers can quickly build, visually edit and debug Rich Internet Applications using the JavaFX Composer.
NetBeans now features OSGi interoperability for NetBeans Platform applications and support for developing OSGi bundles with Maven.
JavaFX SDK 1.3, PHP Zend framework and Ruby on Rails 3.0 are now supported. And improvements have been made to the Java Editor, Java Debugger and issue tracking.
You can download NetBeans 6.9 here.