gitbook
https://www.gitbook.com/
mkdocs
https://mkdocs.readthedocs.io/en/stable/
readthedocs
http://www.readthedocs.io/
sphinx
http://www.sphinx-doc.org/en/master/
各种对比
http://alisonstanton.com/gitbook-penflip-leanpub-sphinx-softcover/
https://www.netlify.com/blog/2017/05/25/top-ten-static-site-generators-of-2017/