Most of the links on this page end up finding their way to free tutorials (some video tutorials). Some got to companies that offer some free and others for a fee. Many require some (free) software. Here are some links on where to get them: Quicktime, VLC, Flash, or Stuffit Expander.

There us another great source for turtorials: Lynda.com. You pay a monthly subscription and have 24/7 access to their training videos online. They also have apps for the iPhone and iPad. Not all subjects are covered. Their focus is less on basic and more on advanced.