Making Additional Websites
Wed 30 May 2018 by authornameGithub Pages allows you to make unlimited websites linked to other repository projects.
For example, you have your main website user.github.io
If you have a separate github repository projectrepo, you can make a project column by going to the 'Projects' header and creating a new column. It can be empty.
Then, go to the 'settings' header and enable Github pages using the master branch.
Now your html files in that repository should show up here:
https://*user*.github.io/
projectrepo