Blitz - The Fullstack React Framework

Blitz is the Fullstack React Framework. It is a batteries-included framework that's inspired by Ruby on Rails, is built on Next.js, and features a "Zero-API" data layer abstraction that eliminates the need for REST/GraphQL. “Zero-API” data layer lets you import server code directly into your React components instead of having to manually add API endpoints and do client-side fetching and caching.

It provides helpful defaults and conventions for things like routing, file structure, and authentication while also being extremely flexible.