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.
H5P - H5P is a free and open-source content collaboration framework based on JavaScript.
EdApp - EdApp is a multi-award-winning mobile-first learning platform that introduces a better way to train teams anytime, anywhere, on any device.
CourseLab - Free powerful e-learning authoring tool
Articulate Storyline - Articulate Storyline is a program that allows you to create interactive courses of any kind with templates and a simple system. There is a free trial offered so that you can determine whether you want to use the program further or not.
LCDs by Microsoft - LCDS is a learning content development program that is highly effective in creating interactive content.