Stories - Master complex materials through short daily stories.
Learn Anything - Search Interactive Maps to Learn Anything
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.
Mindspace - Free learning platform with quick and simple crash courses.
Knudge.me - Notification based micro learning platform
Airbnb - Book unique places to stay and things to do.