Ignite (documentation generator) is described as 'Modern markdown documentation generator into static website' and is an app in the Development category. There are more than 10 alternatives to Ignite (documentation generator) for a variety of platforms, including Self-Hosted solutions, Linux, Mac, Windows and Python. The best alternative is GitBook, which is free. Other great apps like Ignite (documentation generator) are MkDocs (Free, Open Source), Daux.io (Free, Open Source), Docsify.js (Free, Open Source) and mdBook (Free, Open Source).
ditto inspired by flatdoc is a markdown code documentation system, capable of producing documentation similar to Three.js and Backbone.js, check out live demo here. It is designed for people who use Github Pages to host their code documentation, but you can also host it yourself.