You can find a small number of datasets on the Geoplaza website: some georeferenced or even vectorized maps, information about licensed data or datasets created by researchers of the Vrije Universiteit.

The map series database

In the Map Series Database you can find an overview of all published map sheets of important Dutch map series and an inventory of map sheets in the University Library’s collection.

On the web

You can find a wealth of freely available datasets on the web. For Dutch datasets take a look at Publieke Dienstverlening op de Kaart and the Nationaal Georegister.

Also of interest are ESRI ArcGIS Content where you can find a lot of the PDOK datasets in ArcGIS formats and also a free version of the Postcodevlakken data.