Among the most popular Node.js packages, one could find Express.js almost in every list of the most useful NPMs. Express is a backend framework for building applications. The primary merit of the express is its minimal and flexible nature, which allows creating both simple or complex pages. Also, the developers praise its performance and significantly high test coverage. Since Express.js also has robust routing and HTTP helpers, there are a lot of sites that use this framework with Node.js.
This library for Node.js contains microservices that can be used to build apps. The primary purpose of molecular is to build scalable services and provide reliable performance. With the variety of built-in modules, you can find the solution to any development task. Considering that the microservice architecture is a perfect solution to scale an application, using a molecular framework can provide the needed modules to power any application.
It is one of the most popular real-time engines which can provide event-based communication between server and clients. This package is usually used to create highly reliable and low-latency chat applications. After setting up a basic server, you can create functions with io that will be sending the information from the clients to the server and from the server to the clients. The users of this library admit that Socket.io is very easy to use and can be a really helpful package for Node.js.