Geomajas is an Open Source GIS framework. It's developed under the GNU Affero general public licence (AGPL) v3.
Other licensing models for Geomajas are available through Geosparc.
Want to get to know Geomajas? Follow these links to get an overview of all technical and functional specifications.
Watch Geomajas @ the next FOSS4G from Sept 8th to 13th in Portland.