Pronamic

Remco Tolsma

Karel-Jan Tolsma

This plugin add some basic subscription functionalities to WordPress. It allow you 
create subscription information posts (custom post type). You can bind WordPress user 
roles to these subscription post types. In addition, you can bind these subscription 
posts to other posts. This can be used within WordPress templates to check if an post 
has a specific capability.

Pronamic Subscriptions

This plugin add some basic subscription functionalities to WordPress.

LeadElephant

Plugin for integrating LeadElephant into your website.
For more information: <a href="http://www.leadelephant.com/?utm_source=wordpress&utm_medium=link&utm_campaign=leadelephant-plugin-page" title="LeadElephant" rel="nofollow ugc">LeadElephant.com</a>

LeadElephant for WordPress

Plugin for integrating LeadElephant into your website.

Pronamic Subscriptions vs LeadElephant for WordPress