Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!

Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

Collaborator - Система дистанційного навчання повного циклу із аналітикою в реальному часі та інструментами внутрішнього маркетингу.

Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...

Lessonly - Getting teams up-to-speed and keeping them there.

Oppia - Oppia is a free, open-source learning platform.