thats the stuff im doing at work atm:
POLYMAP3 is developed under an open source license (LGPL). POLYMAP3 is based on Eclipse/RAP, OpenLayers, GeoTools, uDig and a lot of other great open source software components.
POLYMAP3 aims to provide a multi-user SDI platform. Supporting the power user with an ad-hoc data workbench, the admin user with configuration workbench and the end users with a simple to use web client and OGC services. UI is the web browser.