GeOxygene aims at providing an open framework which implements OGC/ISO specifications for the development and deployment of geographic (GIS) applications. It is a open source contribution of the COGIT lab. at the IGN (the French National Mapping Agency).
deegree is a Java framework for geospatial software based on the specifications of the OpenGIS Consortium and the ISO. The focus is based on the realisation of OGC specified web services. It is developed in cooperation between lat/lon and the University of Bonn.