Except where otherwise noted, content on this website is licensed under a Creative Commons Attribution 4.0 International license.

Source code

The software source code of is published under the Apache License, version 2.0 on Github.

Building blocks was made possible by using and combining other open source software. The main open source building blocks of are:

Names and logos

  • Both the name and the logo are explicitly excluded from the above licensing. Thus we do not grant permission to use these when our content or software code is reused, unless we make an explicit exception and the related criteria are met (e.g. in case of the 100% badges).
  • The names and logos in the icons that refer to our social media places are explicitly excluded from the above licensing.

Other test websites based on

As far as we know, the following test websites have reused the source code. Please let us know if your website is based on our source code.