title: Split View in Cocoa Apps
body: <p>Does anybody know of any XCode extensions or ways to create the Split View based application seen in Cocoa Touch in Cocoa for use in a Mac application?</p>
  
  <p>Examples I've seen are "Reeder for mac" and the latest Twitter Application in the App Store.</p>
  
  <p>Any help is greatly appreciated, thanks</p>