Drupal Videos and Drupal Themes portal
Drupal CVS using TortoiseCVS By kyl191 as part of Google's Highly Open Participation contest.
Raincity Studios has put together an excellent intro on how to contribute to Drupal with patches.
An introductory screencast that demonstrates the visualize backtrace module
Skitch Screencapture thtt can be used to create drupal screencasts.