Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
GitHub Repository Size - Browser extension to show file and repo size in GitHub
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
GitHub Hovercard - GitHub Hovercard provides neat hovercards for GitHub.
Sawia - Find trending open source projects to contribute to
DownGit - Directly download or create download links to GitHub public folders or files.