DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Udemy - Online Courses - Learn Anything, On Your Schedule
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Adobe Captivate Prime LMS - Adobe Captivate Prime LMS is easy to setup and helps in delivering engaging learning experiences in a personalized manner across devices.
TiddlyWiki - a non-linear personal web notebook
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!