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.
iSpring Free - iSpring Free is a free eLearning authoring tool that allows you to create responsive courses and quizzes right in PowerPoint and convert them to HTML5 or SCORM.
LimeSurvey - LimeSurvey: the Online-Umfrage Tool - Open-Source Suryeys
EdApp - EdApp is a multi-award-winning mobile-first learning platform that introduces a better way to train teams anytime, anywhere, on any device.
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
CourseLab - Free powerful e-learning authoring tool