elevio hub - For continuous user education
GitHub Reader - A quick way to browse GitHub issues and pull requests.
Gitea - A painless self-hosted Git service
Shrink for Github - A macOS app for your Github issues
Helix Core - Helix Core is a scalable version control that securely manages all of your digital content and delivers files quickly to large, distributed teams.
Codetree - You can manage your entire development process through GitHub.