Bulma - Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Milligram - A minimalist CSS framework
Collaborator - Система дистанційного навчання повного циклу із аналітикою в реальному часі та інструментами внутрішнього маркетингу.
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design
Lessonly - Getting teams up-to-speed and keeping them there.