Webconverger is a locked down Debian, that only allows access to a Web browser. Conceivably the Java testing app could be deployed through the browser via their Java browser plugin.

By default Webconverger does not ship with Java, though you can order a customised version from http://webconverger.com/buy with it included.

Today Webconverger released with an HTML5 video enabled build today: http://webconverger.org/blog/entry/5.7_with_Firefox_3.5/

The plan is once HTML5 video becomes prevalent, the integrated proprietary flash player will be dropped. http://webconverger.org/adobe/

http://webconverger.com/ uses http://dwm.suckless.org/

DWM is a "new" lightweight Window Manager.