Jet Admin - Build business apps really fast
Flamelink.io - Flamelink.io is a headless CMS for Firebase.
Retool - Build custom internal tools in minutes.
PushTable - Headless CMS for Google Firestore and Firebase
Appsmith - Appsmith is an open source web framework for building internal tools, admin panels, dashboards, and workflows.
Strapi - Strapi is the most advanced Node.