Sourcebank
   GUI downloads for developers.
   http://archive.devx.com/sourcebank/directorybrowse.asp?adType=&dir_id=885&showResType=0&timeSelect=&showFilter=showAll

The Y Window System
   Project writing successor of X Window System. The Y design has the following features: Network Transparency, Modularity (plug-in style: dynamically unloadable and reloadable), In-server implementation of widgets, Consistency and Themeability, Support for
   http://www.y-windows.org/