GitHub Pages - A free, static web host for open-source projects on GitHub
Gitscout - A beautiful Github Issues experience for macOS
Netlify - Build, deploy and host your static site or app with a drag and drop interface and automatic delpoys from GitHub or Bitbucket
GitHub Reader - A quick way to browse GitHub issues and pull requests.
surge.sh - Static website hosting for front-end developers.
Codetree - You can manage your entire development process through GitHub.