Password security rainbow table module for Drupal.

Uses https://www.projecthoneypot.org/ to prevent spam. I haven't used it, but it comes pretty highly recommended by others. Use http:BL with Honeypot and possibly Mollom for ultimate spam protection.

This module "allows permissions to be set to each field within the Authoring information and Publishing options field sets on the node form. It also allows selected field sets to be set as collapsed and / or collapsible."

"This module allows fine-grained access control of user administrators, by providing various editing protection for users. The protections can be specific to a user, or applied to all users in a role."

A spam prevention tool. Also see Mollom and Honeypot.

This module shows if Drupal or any of its modules have been changed. If you have the Diff module installed, it will show you the exact lines changed.