Bespin the Next Generation Web Code Editor

“Bespin is a Mozilla Labs experiment on how to build an extensible Web code editor using HTML 5 technology.”

I have tired an experimental embed ofBespin here Do read more

[ The Main features of Bespin :

• Ease of Use — the editor experience should not be intimidating and should facilitate quickly getting straight into the code
• Real-time Collaboration — sharing live coding sessions with colleagues should be easy and collaboratively coding with one or more partners should Just Work
• Integrated Command-Line — tools like vi and Emacs have demonstrated the power of integrating command-lines into editors; Bespin needs one, too
• Extensible and Self-Hosted — the interface and capabilities of Bespin should be highly extensible and easily accessible to users through Ubiquity-like commands or via the plug-in API
• Wicked Fast — the editor is just a toy unless it stays smooth and responsive editing files of very large sizes
• Accessible from Anywhere — the code editor should work from anywhere, and from any device, using any modern standards-compliant browser

Read about customizing bespin ](http://vimeo.com/3195079)