CKEditor - Real-time collaborative future-ready rich text editor
Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
Sli.do - Slido is the ultimate Q&A and polling platform for live and virtual meetings and events. It offers interactive Q&A, live polls and insights about your audience.
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.
Mentimeter - a web-based polling tool for workshops, conferences & events