International Baccalaureate
http://www.ibo.org
InterNations
https://www.internations.org
IamExpat in the Netherlands
https://www.iamexpat.nl
IamExpat in Germany
https://www.iamexpat.de
Nuffic
https://www.nuffic.nl/en/subjects/study-in-holland/
Anabin
https://www.anabin.kmk.org/anabin.html