DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Collaborator - Система дистанційного навчання повного циклу із аналітикою в реальному часі та інструментами внутрішнього маркетингу.
TiddlyWiki - a non-linear personal web notebook
Lessonly - Getting teams up-to-speed and keeping them there.