EtherPad is a collaborative, real-time text editor created by, among others, two ex-Google employees*. An EtherPad document is quickly set up without any need for registration.
You can then share the URL of the document, and others who will visit that page will then be able to see, in real-time, whatever you’re typing**. This has an interesting feel to it because there’s no “security buffer” as in typical chat programs: every letter you write will be shown as you write it, including occasional errors before you fix them. (more…)