What is CMS.js?
CMS.js is fully client-side, Javascript site generator in the spirit of Jekyll that uses plain ol' HTML, CSS and Javascript to generate your website. It takes your content, renders Markdown and delivers a complete website in Single-Page App fashion...without the aid of server-side scripting (no Node.js, PHP, Ruby, etc.).

https://www.flatfilecmslist.com/cms/
https://github.com/ahadb/flat-file-cms/
http://trendschau.net/blog/uebersicht-flat-file-cms/
http://www.hongkiat.com/blog/flat-cms/
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* Pico: http://picocms.org/ | Portfolio Theme, Plugins , MD
* Yellow: http://datenstrom.se/yellow/ | Editor, Plugins + Themes
* baun: https://bauncms.com/ | MD, Editor, Twig Templates
* Automad: http://automad.org/ | Portfolio Theme, Editor, MD
* Typesetter: http://www.typesettercms.com/ | Editor, viele Plugins + Themes
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* Grav: https://getgrav.org/ | MD , Plugins + Themes, Videoplugin
* Flextype: http://flextype.org/ | (Monstra+Fansoro) Videoplugin + Themes
* HTMLy: https://www.htmly.com/ | eher für Blogs
* Typemill: http://typemill.net/ | MD, schlank, eher für Textseiten
* CMSuno: https://github.com/boiteasite/cmsuno | Editor, für Onepager
* CMSimple: https://www.cmsimple.org/ | Video+Kalender-Plugins, altbacken
* WonderCMS: https://www.wondercms.com/ | Onscreen-Editor
* Nibbleblog: http://www.nibbleblog.com/ | eher für Blogs
* Sitemagic CMS: https://sitemagic.org/ | Editor, bloaty
* Blozilla: http://www.blozilla.com | Editor, Backplane
* BootPress: https://www.bootpress.org/ | Bootstrap based, nicht trivial
* Novius OS: http://www.novius-os.org/
* Microweber: https://microweber.com/ sehr groß!
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* Mecha: http://mecha-cms.com/ | keine Demo
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**COMMANDLINE INSTALLATION:**
* Hugo: http://gohugo.io/
* Parvula: https://parvulacms.github.io/
* Postleaf: https://www.postleaf.org/
* Radiant: http://radiantcms.org/
* Middleman: https://middlemanapp.com/
* Apostrophe: http://apostrophecms.org/
* Herbie: https://www.getherbie.org/ | zu simpel, Plugins per cl

**NOT FLAT, but worth a look:**
* ElefantCMS: https://www.elefantcms.com/
* Pagekit: https://pagekit.com/ | Editor, Portfolio Theme
* Koken: http://koken.me/
* Secretary: http://secretarycms.com/
* Rexo: http://rexo.ch/ | zu komplex

modern HTTP web server index for Apache httpd, lighttpd, nginx and Cherokee