Grav : Grav is a modern open source flat-file CMS written in PHP
Data Science Toolkit : A collection of the best open data sets and open-source tools for data science, wrapped in an easy-to-use REST/JSON API with command line, Python and ...
Strapi : Open source Node.js Headless CMS to easily build customisable APIs
GetSimple CMS : GetSimple is an XML based, stand-a-alone, fully independant and lite Content Management System.
drupal.org : Drupal is an open source content management platform powering millions of websites and applications. It’s built, used, and supported by an active and ...
Simple Content Platform to manage any structured content.
A self-hosted headless and api-driven CMS.