Visily - The easiest and most powerful wireframe software for agile teams.
Memeto - Memeto is a meme maker app that lets you create your own customizable memes.
Learn SpriteKit by Design+Code - Make a platformer iPhone game from scratch in Swift 4.
Musaic Box - Melodious music box puzzler game
Bootsketch - Ship products instead of renaming layer groups
Resynth - Relax, remix and restore with Resynth, a minimal musical puzzler.