PublicAPIs - Explore the largest API directory in the galaxy
Anima App - Design, get feedback, convert to code, publish, iterate.
API List - A collective list of APIs. Build something.
Sketch Repo - Collection of resources for anyone who uses Sketch
API for Product Managers - The A to Z of APIs for product managers
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.