A clone of SwingWT:http://swingwt.sourceforge.net/

SwingWT is a 100% pure Java library which aims to be a free implementation of Swing and AWT. Unlike Swing, it drives native peer widgets for your platform from SWT.

SwingWT offers many benefits:

*More responsive GUIs and faster startup times *Less RAM usage for applications *Many developers prefer the Swing API *Existing Swing applications don't need to be recoded *Mature Swing UI designers can be used *Developers deploying to *nix/Win32 can compile natively with GCJ and the applications can be distributed without a VM. Linux distribution makers could package many existing Java/Swing applications that previously could not be distributed in workable state. *SWT components can be directly accessed through the API, allowing mix and match (make Eclipse plugins with Swing!) *All platform benefits such as font sub-pixel decimation for LCD monitors (unavailable in Swing) *Use Swing on mobile devices! *The best of both worlds! New Swing components for JClosableTabbedPane, JCoolBar, JTaskTrayItem.. *A FREE implementation of Swing you can redistribute and modify to suit your own requirements *Insulation from changes to the SWT APIs *Insulation from differences between SWT platforms