Bespin from Mozilla Labs - Mozilla's open, extensible web-based framework

Bespin is a Mozilla Labs experiment that proposes an open, extensible web-based framework for code editing that aims to increase developer productivity, enable compelling user experiences, and promote the use of open standards.

The initial experimental prototype of Bespin has been released to demonstrate some of the concepts of Bespin and the possibilities that it opens up.

Bespin 0.1

• Initial prototype framework that includes support for basic editing features, such as syntax highlighting, large file sizes, undo/redo, previewing files in the browser, importing/exporting projects, etc.

Screenshots of Bespin 0.1 running in modern, standards-compliant browsers