I don't have a Facebook or Twitter account
How to use the various APIs provided by the iOS SDK like Mail, Phone, Safari, SMS, Photo Library, Camera and Contacts.
How to give a visual indication to the user that something has happened using UILabel.
How to store contact information in a SQLite database. In addition to data storage, it allow the user to search the database for the address and phone number of a specified contact name.
iOS Custom PageControl Tutorial that allow you to create and manage page controls without using the iOS API i.e, UIPageControl.
Learn how to build applications for the iPhone and iPad platform using the iOS SDK. Full course by Stanford University.
Part 1 - MVC and Introduction to Objective-C