Appsmith

Appsmith is the first open-source low-code tool that quickly helps developers build dashboards and admin panels. The platform helps businesses build any custom internal application within hours.

Appsmith’s feature-rich core platform is free to use forever for self-hosting, or use the free cloud edition at https://app.appsmith.com

For tips, tutorials, videos, and more good stuff, check out https://community.appsmith.com. As a bonus, it is built with drupal!