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.
GitHub Personal Website Generator - Generate a personal website based on GitHub contributions
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.
Jekyll-post-via-web - Update your GitHub-hosted Jekyll blog from your browser
GitHub Repository Size - Browser extension to show file and repo size in GitHub
Blog Starter by prismic.io - Publish a blog with API-based CMS