Datree.io - GitOps policy engine
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
GitLocalize - Localize your GitHub repository, continuously.
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Reporting Tool For Gitlab - Issues, time & cost centre analysis across repositories
GitHub Hovercard - GitHub Hovercard provides neat hovercards for GitHub.