No, Sublime Text was one of the apps in mind when I said a custom-framwork based cross-platform (or homemade might been a better phrase).
I evaluated Sublime for my editor, and found that it’s OS integration was too bad; for one it’s tabs is custom-based and it’s text fields aren’t Cocoa (or at least it doesn’t feel like one). It’s primarily built as a cross-platform, so it really doesn’t consider OS integrations IMO.