APIs With GitHub - Create simple JSON APIs with GitHub Repository
GitPress - A blog writing tool based on GitHub, designed for developers
GitLocalize - Localize your GitHub repository, continuously.
HubPress - A free, open source tool you can use to build a blog using GitHub Pages and AsciiDoc. HubPress is a web application that makes it easy for you to maintain a blog.
HackfestWithFueler - 100+ Open Source Repositories
Sairin - You can one-click deploy a blog on Vercel that fetch blog posts from your GitHub repository's issues.See https://blog.sairinjs.com/introducing-sairin for more details.