We have open source React framework alternative for Retool and other similar tools.

Repo: https://github.com/refinedev/refine

It is headless by default and supports Material UI, AntDesign, Chakra UI, and Mantine.

It also has connectors for 15+ backend services including REST API, GraphQL, NestJs CRUD, Airtable, Strapi, Strapi v4, Strapi GraphQL, Supabase, Hasura, Nhost, Appwrite, Firebase..

You can compare with Retool and other similar tools https://refine.dev/docs/comparison/