
Adobe is very keen on HTML5 and the open web in general. This isn't just PR talk, it realized that Flash won't cut it for a lot longer and started supporting HTML5 in a big way. One example is the Brackets code editor which is available under an MIT license on Git Hub.
The editor is intended for HTML, CSS and JavaScript, but it's in the early stages and a lot more functionality is planned. What's more, modularity and extensibility are at the core of the design and there's no reason why users can't expand the editor's functionality to support more languages. Of course, HTML editors are a dime a dozen, what makes Brackets special is that it's actually built with HTML and JavaScript. In fact, the Adobe developers use Brackets...