GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Deck - A multi-timeline viewer for GitHub repository events
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
weekend - The better-chances way to push your side project
GitHub Hovercard - GitHub Hovercard provides neat hovercards for GitHub.
Chronologies.io - Your Memories, Your Story, Your Timeline