Collaborative Real-Time Editing
EtherPad is a collaborative, real-time text editor created by the originators of AppJet. An EtherPad document is quickly set up without any need for registration. By sharing the URL of the document that you created, others who visit that page will be able to see, in real-time, whatever you’re typing. This is awesome for collaborating on that script, or piece of code that you want your super-duper developer friend to help you on. Currently they have syntax highlighting for JavaScript, but I am assuming that they will begin supporting more languages in the near future. Head on over there and check them out!