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