Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
Anki - Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
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.
Discovery FlashCards - Discovery FlashCards is a unique free program that can help you study.
Mentimeter - a web-based polling tool for workshops, conferences & events
RemNote - All-in-One Tool For Thinking & Learning