Stories - Master complex materials through short daily stories.
5 Minute Reader - A simple app to read a different short story everyday.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
The Story Suite - Create Snapchat like stories on desktop, embed them anywhere
Learn Anything - Search Interactive Maps to Learn Anything
Tenreads - The ten best stories on the things you care about. Everyday!