Useful for any other module that creates output outside of the Drupal website and need to include links back to the site which contain the identity of a site member. For example, it could be used in an email, personalised PDF, SMS, RSS feed, or voice message to identify the user it's for.
This module allows you to authenticate users with a browser-based password (HTTP Auth). You can restrict access to the site by role and choose to secure restricted pages or the entire site. This means the site will be inaccessible to search engines and other crawlers, but you can still allow access to certain users.
This module allows the site admin to create custom error pages for HTTP status codes 403 (access denied) and 404 (page not found), without the need to create nodes for each of them.
Enable users to create and manage their own 'groups'. Each group can have subscribers, and maintains a group home page where subscribers communicate amongst themselves.