Gizmox released its Visual WebGui development environments' version 6.3.3 as a further stabilization of the 6.3 Ajax & Silverlight framework/platform for developing and deploying RIAs.
Visual WebGui allows you to develop and deploy web applications using WinForms methdologies as well as an easy migration path from desktop applications to the web. It also allows you to create multi presentation layers from the same code base and to choose between presenting in DHTML or Silverlight.
All 6.3.3 can be downloaded for free here.