Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Udemy - Online Courses - Learn Anything, On Your Schedule
Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
Adobe Captivate Prime LMS - Adobe Captivate Prime LMS is easy to setup and helps in delivering engaging learning experiences in a personalized manner across devices.
Kodular - Much more than a modern app creator without coding
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!