The following is a list of sites that we have found to be useful:
MacMost is a video podcast and blog that teaches you how to use your Mac, iPad and iPhone. At MacMost.com you will find more than 2,000 videos, a weekly newsletter, tips, and recommendations. You can contact MacMost via email.
David A Cox: Tech Talk America was born when I decided to marry my two passions together; video production and teaching tech to people who do not identify as being tech savvy.
Davies Media Design (Gimp)