GitHub Contributions - All your GitHub contributions in one image
Email Inspire - Discover the best of email design and marketing — Browse email newsletters from top brands.
GitHub Metrics - Customize your profile with various plugins and metrics
EmailWay - Collection of the most insightful and informative email newsletters from across a wide spectrum of industries and interests
GitWrapped - View/Share how you contributed to Github over the years
Really Good Emails - A large collection of good product email design.