GitLocalize - Localize your GitHub repository, continuously.
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Dowork - A collaborative software cost and time estimation app
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Zube - Project management for developers.