PixelFed - PixelFed is a federated image sharing platform, powered by the ActivityPub protocol.
Visily - The easiest and most powerful wireframe software for agile teams.
Gab - Gab is an ad-free social network dedicated to free speech.
PSD to Sketch Design Converter - Convert a Photoshop design to a layered Sketch file for free
Friendica - Decentralisation - Privacy - Interoperability
Learn SpriteKit by Design+Code - Make a platformer iPhone game from scratch in Swift 4.