* [3D City Database v5.1.3](https://github.com/3dcitydb/3dcitydb) – 3D geo database for storing, representing, and managing virtual 3D city models.

* [3DCityDB Tools for QGIS v.0.8.14](https://github.com/tudelft3d/3DCityDB-Tools-for-QGIS) – QGIS plug-in to connect to 3D City Database and load, manage, edit and visualize CityGML/CityJSON data.