In the framework of its project ”Gebouwen and Adressenregister”, the Flemish Region’s Information Agency develops on Github and licenses under the European Union Public Licence (EUPL v1.2) a series of tools and registers: the postal information, street names, parcel and municipalities registers and “public-api”, a common application programming interface across all provided registers.

Other tools are licensed under the permissive MIT licence or, concerning the portal, the inherited Apache 2.0 licence.

More information:
https://github.com/informatievlaanderen