title: Good open source Mac OSX App for code study?
body: <p>I'm rewriting my Mac OSX App (which is full of spaghetti code), but before I do so, I'd like to take some time and study an existing Mac OSX App.</p>
  
  <p>Is there something good available on github.com or elsewhere where I can learn good coding conventions?</p>
  
  <p>Specifically I'm looking for Mac app that makes use for CoreData, NSOutlineView, Bindings, etc.</p>
  
  <p>Thanks</p>