Datree.io - GitOps policy engine
GitLocalize - Localize your GitHub repository, continuously.
GitHub Reader - A quick way to browse GitHub issues and pull requests.
Reporting Tool For Gitlab - Issues, time & cost centre analysis across repositories
Gitscout - A beautiful Github Issues experience for macOS
GitLab Pages - GitLab Pages you can create static websites for your GitLab projects, groups, or user accounts.