If you have ever linked a file, or uploaded an image in an editor in Fork CMS you probably didn't noticed it, but in fact you have used the CKFinder-plugin for CKEditor. CKFinder isn't open-source, so in the past Figure8, SumoCoders and Wijs have sponsored the OEM license.
As the license is renewed a new key is in place, and this one should be used from now on. As long as you don't upgrade the CKFinder you won't notice anything.
We needed to create a (huge) webshop in Fork CMS, depending on external software for its ten thousands of products and categories. Unfortunately that external database was missing important tree-structure information about how the website should show categories and its products. That's why we needed fast caching using Redis.