title: Well-written Open Source Cocoa apps to learn from?
body: <p>I'm learning Cocoa, and while I get comfortable with Objective-C and the concepts around it, I sometimes struggle applying the theory (like Model/View/Controller) to practice. Apple's documentation often gives me 'A Ha!' moments, but it would be cool to have a well-written Cocoa App as a reference.</p>
  
  <p>So, do you know of a very well written Cocoa App with public source code?</p>