These Drupal 6 examples files are included here as part of our Drupal source code examples project. (Please see that project page, including our promise to donate back to the Drupal open source community.)
This content is from the Drupal 6 examples project README file:
Examples modules This set of modules is intended to show how to use various Drupal features. It's intended only for developers. If you find a problem, bad comment, poor usage, out-of-date API usage, etc., please post an issue in the issue queue at http://drupal.org/project/examples.
These are direct links to the Drupal 6 examples project source code files included in this project: