Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...
Collaborator - Система дистанційного навчання повного циклу із аналітикою в реальному часі та інструментами внутрішнього маркетингу.
Kiwix - Kiwix enables you to have the whole Wikipedia at hand wherever you go!
Lessonly - Getting teams up-to-speed and keeping them there.