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.
Visily - The easiest and most powerful wireframe software for agile teams.
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
Learn SpriteKit by Design+Code - Make a platformer iPhone game from scratch in Swift 4.
RemNote - All-in-One Tool For Thinking & Learning
Bootsketch - Ship products instead of renaming layer groups