Objectify

Objectify is a new Mac application for Objective-C developers that dramatically speeds the everyday process of creating Cocoa class implementations based on JSON content.
JSON is rapidly becoming the de facto standard data serialization format for Web APIs, used in thousands of applications.

Creating model classes based on this content has been a tedious chore that invites bugs and heartache.
Until now.
Objectify saves you time and effort by spinning through any JSON content you give it, building customizable models that can be exported as Objective-C header and implementation files, ready to be dragged into your editor of choice. If you're a user of the mighty Accessorizer, Objectify can use it for code generation so all your style preferences are already taken care of!
Clever developers have noticed that this also makes Objectify a great prototyping and scaffolding tool. It only takes a few seconds to go from an idea for a class to having working code based on your favorite templates.