Astro : Astro is an all-in-one web framework for building fast, content-focused websites.
Cockpit : Simple Content Platform to manage any structured content.
A self-hosted headless and api-driven CMS.
textfiles.com : What this site offers is a glimpse into the history of writers and artists bound by the 128 characters that the American Standard Code for Information...
EtherPad : Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js