Dodona
Dodona is the automated programming-practice platform that originated at Ghent University and is still used in its computer-science teaching; Ghent registered it as a service provider in the Belnet R&E Federation under https://dodona.ugent.be/users/saml/metadata. It is recorded as a tenant relationship, not a Ghent surface, because dodona.ugent.be now 301-redirects to dodona.be, which is operated on its own domain with its own pricing behind Cloudflare. Its JSON API (any path with a .json suffix) and its LTI content-selection endpoint are Dodona's, and no Dodona contract is saved under Ghent.