Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.
All of these tutorials range from basic learning for the beginner, to advanced for the expert who wants to learn new techniques. Basically everyone can take something from these tuts.
Etomite is a Content Management System, which allows you to remotely administer your website from anywhere that you have an Internet Connection and a compatible Web-Browser.