Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside of a browser. Learn more @Wikipedia

• Node.js is an open source server environment
• Node.js is free
• Node.js runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.)
• Node.js uses JavaScript on the server

I do not take credit for anything related to Node.js. However, if there are errors in my code, do make a PR. It's encouraged.