Amethyst is a custom-built websocket server built for Node.js.

By custom-built, we mean that it has been built with as much attention to detail as possible, enabling ease of use and customizability!

For starters, you have a lot more control over it than your own hastily-made script, so you can rest assured that your server is safe.

In case you're still curious about the entire list, you should click below.

To tell you the truth, it's complicated, but at the end of the day, it is a standard mechanism of browsers that enables things like chat and games on the internet!