Sketch Repo - Collection of resources for anyone who uses Sketch
Really Good Emails - A large collection of good product email design.
AT-UI - UI library for developing powerful web interfaces
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.
UI Libraries by Shuffle - A marketplace for busy front-end developers
Email Love - Email design inspiration, templates and discovery