UserAuth is the subscriptions component currently controlling the subscriptions and article downloads on this site.

Features:

• Paypal integration.  Enter your Paypal information in the parameters and Buy Now buttons will automatically be created for users to subscribe.
  
  
• Integrated attachments support.  Attachments can be added to articles, and these are also limited to subscribers (where subscriptions exist).  The attachments functionality is based on the com_attachments component written by Jonathan M. Cameron, but has been extended to support historical logging (tracks who downloaded what) and account authentication.  The User Interface has also been updated.
  
  
• Prevent guests from downloading attachments to Mosets Tree articles (allow registered users only).
  
  
• Multiple subscription support.  Each category/section/page can be available on one or more subscription packages, meaning you can taylor the subscriptions as best for you.
  
  
• Exclusion support.  You can make an entire category/section subscriber only, and then exclude certain pages from within this category/section.

This component will be available soon, subscription to the download and documentation pages will be £44.99.  As with all my Joomla! components, it will be released under GPL.