Payload CMS - Headless CMS and Application Framework built with Node.js, React and MongoDB
React Bricks - React Bricks is a CMS with the best Visual editing experience for Content editors, but great for Developers too, as content blocks are React components defined in code.
DatoCMS - Connect DatoCMS to your favorite site generator, build the perfect backend and deploy anywhere you like.
CodeSee Maps - Maps are auto-generated, self-updating code diagrams.
Flamelink.io - Flamelink.io is a headless CMS for Firebase.
WeWeb - WeWeb empowers anyone to build a professional looking website in minutes. It is based on components developers can easily customize.