Visily - The easiest and most powerful wireframe software for agile teams.
PanoramaCrop for Instagram - PanoramaCrop for Instagram is a free photography app that allows you to easily splits your wide photos so you can make the most out of the new Instagram’s multi-photo images, created and published by Muffin.
PSD to Sketch Design Converter - Convert a Photoshop design to a layered Sketch file for free
King Camera - Cam 360 Selfie Camera, King Camera is one of best, a professional selfie camera app that takes beautiful selfies in seconds with effects filters.
Learn SpriteKit by Design+Code - Make a platformer iPhone game from scratch in Swift 4.
Open Camera - Open Camera is an open-source camera app for Android phones and tablets.