Very rich resource for iOS learning on iTunes U

While searching iOS learning resource I found there are very good and rich iOS learning course on iTunes U, The most cool thing is these are all free to use. Actually not just for iOS development but also others programs provided by other universities all over the world. Thanks lots for all these sharing.

• From Stanford University 
• iPad and iPhone Application Development (HD) by Paul Hegarty  I am watching this course. The lecture worked in Apple Inc. before and is very good on explain stuffs. 

• From  RWTH Aachen University
• iPhone Application Programming '11 by Prof. Jan Borchers
  Haven't start to watch yet.