Zeplin - Collaboration app for UI designers & frontend developers
Visily - The easiest and most powerful wireframe software for agile teams.
Handoff by Marvel - Automatically turn designs into assets, specs and code
InVision Studio - The world’s most powerful screen design tool
Handoff Helpers - Free Figma library to make designers better communicators
Learn SpriteKit by Design+Code - Make a platformer iPhone game from scratch in Swift 4.