Koa is a new web framework designed by the team behind Express, which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs.
You may also be interested in ...
Fastify
Fastify is a fast and low overhead web framework, for Node.js Fastify is a web framework highly focused on providing the best developer experience with the least overhead and a powerful plugin architecture. It is inspired by Hapi and Express and as far as we know, it is one of the fastest web frameworks in town.
MEAN.JS
MEAN.JS is a full-stack JavaScript solution that helps you build fast, robust, and maintainable production web applications using MongoDB, Express, AngularJS, and Node.js.
KeystoneJS
KeystoneJS is an open source framework for developing database-driven websites, applications and APIs in Node.js. Built on Express and MongoDB.