GitPress
A blog writing tool based on GitHub, designed for developers
10 Alternatives To GitPress
Blog by Versoly
Build a SaaS blog that converts
Dillinger
joemccann has 95 repositories available. Follow their code on GitHub.

GitHub Pages
A free, static web host for open-source projects on GitHub

GitLab Pages
GitLab Pages you can create static websites for your GitLab projects, groups, or user accounts.
Github Widget
An embeddable widget for all your GitHub stats and projects
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.
MWeb
Pro Markdown writing, note taking and static blog generator

Ulysses III
A powerful writing tool for Mac, iPad, and iPhone
UnMarkDocs
Unleash the Power of Markdown to Write Better Product Documentation
markdown to web
Convert markdown to online web page