Drupal is a powerful framework and content management system (CMS) on top of which also this site is built. It has many modules which provide most of the functionality that websites need and it is also easy to use for the end user, the site provider, possibly you.
We are proud to present our contributions to Drupal which are hosted here and on the Drupal website:
Feemanager: http://drupal.org/project/feemanager
Email Download: http://drupal.org/project/email_download (not on Drupal.org yet, please download here for now). This module is mainly sponsored by Virtuate and iHostNZ.