GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Screely - Screely instantly generates dribbble-ready images. Simply upload your screenshot and we'll do the rest.
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Screenzy - A simple screenshot beautifier
GitHub Hovercard - GitHub Hovercard provides neat hovercards for GitHub.
Glorious Demo - Create glorious animations to show your code in action.