Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Design Principles - An open source repository of design principles and methods
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Product Disrupt - A design student's list of resources to learn Product Design
GitHub Hovercard - GitHub Hovercard provides neat hovercards for GitHub.
WatchAware - Curated collection of the best third-party Apple Watch bands