Open Source

Beside commercial software packages there is also a number of Open Source Projects that support CityGML.

 Open Source Projects

Code Synthesis	CodeSynthesis XSD, an open source, cross-platform XML data binding compiler for C++. Supports generation of the object model as well as parsing and serialization code from CityGML schemas. --> Download --> More information on using with CityGML
Institute for Cartography and Geoinformation, University of Bonn	Aristoteles, an Open Source viewer for CityGML Data. --> Download
Institute for Geodesy and Geoinformation Science, Berlin University of Technology	3D City Database, a free 3D geo database for the storage and management of virtual 3D city models based on CityGML - to be used in conjunction with Oracle 10G R2 Spatial (or 11G). 3D City Database Import/Export Tool, a free and open-source Java software tool facilitating the import and export of CityGML datasets into the 3D City Database. citygml4j, an open-source Java class library and API for the processing of 3D city models encoded in CityGML. --> more information and download
BIMserver.org	BIMserver, Open source building information modelserver based on IFC. Has an export function from IFC to CityGML (including the GeoBIM ADE extension) --> more information and download