The User-friendly Desktop Internet GIS (uDig) is both a GeoSpatial application and a platform through which developers can create new, derived applications. uDig is a core element in an internet aware Geographic Information System.

openXMA is a framework and a set of development tools (Eclipse plug-ins) for implementing Java thin, rich client applications. Basically, openXMA programs are web applications where client side Java code, based on SWT, will be downloaded and executed automatically. So look-and-feel like typical OS native rich clients is provided. Client code is cached locally, client and server halfs are communicating highly optimized via http. Please have a look to the project site http://openxma.codehaus.org/ to get more information.