Frappe

Frappe Framework is a full-stack web application framework that uses Python on the server, a MariaDB or PostgreSQL database and a tightly integrated client library. It was created for ERPNext and describes itself as low-code, built on the principle that code you never write needs no maintenance.

Its design is metadata-driven: developers define the structure and meaning of their data, and the framework generates the application around it. Features include a built-in customizable admin interface, role-based permissions for users and roles, and an automatically generated REST API for all models. Topics also mention webhooks, email, Socket.IO real-time updates, multitenancy and security.

Frappe is MIT licensed and self-hostable, and ERPNext, which has hundreds of object types, was the first application built on it. The README is frank that it is not the first thing a beginner should learn, aiming it at developers who are ready to build substantial business applications. It also serves as a base for CMS and internal tools.