Express

Since Express.js version 4.16.0, body-parsing middleware is included directly in the framework. You can simply use `express.json()` and `express.urlencoded()` without needing an external package.

Express uses a robust routing system where you define endpoints using HTTP methods like `app.get()` or `app.post()`. For complex applications, developers can use `express.Router()` to modularize route definitions into separate files.

Middleware functions are functions that have access to the request, response, and the next cycle in the application's pipeline. They can execute code, modify the request and response objects, or end the request-response cycle entirely.

Yes, Express is maintained under the OpenJS Foundation. While Express 4 remains the industry standard, Express 5 has been in active development to modernize the underlying architecture.