CommonMap is an open source map project, forked from OpenStreetMap by a licence problem. CommonMap needs original softwares tuned for CommonMap. Most of software would be useful for any other open source map projects, too.
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.
Musmap is a web interface to UMN mapserver. It provides users and profiles management, advanced queries and selections, automatic decodification of columns with joins, easy-to-use configuration (colors, ...)... and so on.