Pico is a stupidly simple, blazing fast, flat file CMS. See https://picocms.org/ for more info.

Requires PHP 5.3+

Download composer and run it with install option.

$ curl -sS https://getcomposer.org/installer | php
$ php composer.phar install

The easiest way to Pico is using the built-in web server on PHP.

$ php -S 0.0.0.0:8080 ./

Pico will be accessible from https://localhost:8080.

Visit the Pico Wiki for plugins, themes, etc...