Node.js
Node.js is an open-source, cross-platform runtime environment that allows developers to run JavaScript code outside of a web browser. It was created by Ryan Dahl in 2009 and is built on top of Google's V8 JavaScript engine.
Node.js is commonly used for building server-side applications, such as web servers, APIs, and real-time applications.
Node.js can be used with a variety of frameworks and libraries, including Express.js, Koa, and Socket.IO. It is also commonly used for building modern web applications with technologies such as React, Angular, and Vue.js.