Hi, I am learning cocoa and I have just finished up my 3rd app. I like my app, however I'm not too fond of the interface. If you look at wunderlist or twitter app, they all have beautiful stunning GUI. are there any tutorials that shows me how to subclass an UI element and make beautiful UI elements? Any free graphics I can download (like iconfinder, iconarchive) websites like cocoacontrols.com will help too. thanks in advance.