I’m aware of the SubEthaEdit Engine that Panic uses in Coda, but are there any decent open source Cocoa classes for presenting a code-oriented text field editor?
I’d like to provide a feature in my Mac app where users can edit code using syntax highlighting and perhaps autocompletion, and I’d prefer not to re-invent the wheel or spend all my time on this one aspect.
While I have no direct experience with this code, it does fit your bill – code editing and syntax highlighting:
Meet Fraise!