From 2003 to 2010, Steve Jobs appeared at the D: All Things Digital conference and gave candid, unrehearsed answers on topics including Apple, its competitors, and many other aspects of the digital world. (He even made one appearance with rival Bill Gates.) High-quality videos of those appearances are now available free on iTunes, write Walt Mossberg and Kara Swisher of AllThingsD. The videos serve as memorials "to a great man," they write, and are "priceless piece[s] of history." (More Steve Jobs stories.)