MongoPress
www.mongopress.org
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
MongoPress is an instantly scalable, incredibly flexible CMS that uses MongoDB and PHP to deliver a powerful object-oriented environment that is flexible and free. It is not only freely licensed and distributed under a generous GPL license, but it is also free from the constraints that many of the leading MySQL-based CMS platforms suffer from. MongoPress was in many ways inspired by WordPress, and was originally planned as a plugin, but after realizing that WordPress had been built from the ground-up as a table-based MySQL-driven architecture, providing MongoDB support was not going to be an easy task, and in some ways, even seemed to defeat the point of a NoSQL environment.