Geoclipse is a collection of Eclipse plugins, that allow you to add mapping capabilities to your Eclipse Rich Client applications. Current development happens on github! http://michaelkanis.github.com/geoclipse
GeoAr intends to be a rich client for WMS and WFS services. It's developed on LZX (OpenLaszlo), so it would serve dhtml(near future) and flash to the user's browser giving the chance of select between them, but having only one server's cource code.
MAP - Map Assembly Project, server/rich-client based framework to jointly create a public street map from GPS-Logs (like NMEA), which can then be used for other Open Source projects, especially for navigation purposes. Alpha state.