Charjing

Charjing provides a very simple products billing and subscription management.using custom post type

Charjing For Subscription Billing

This Plugin allows you to  manage products and receive payments using authorize.net merchant account.

sftranna

EC Authorize.net is easy to use WordPress Plugin and can be installed in just a few minutes.
Authorize.net is most widely used payment gateway to process payments online and accepts Visa, MasterCard, Discover and other variants of cards.
Recurring Payments option is added in version 0.3
Non-profits and eCommerce sites will using EC_Authorize.net to Quickly and Easily add one time and donations/Payments to their websites. 
It works with your existing WordPress theme and content. No changes required. Just install and start getting payments/donations through Authorize.net.
Your Thoughts => http://ecarobar.com/ec-authorize-net/
Sample Usage: [authorize_net amount=56]
<h3>Arbitrary section</h3>
You can use shortcode as following
<ol>
<li>
[authorize_net]
</li>
<li>
[authorize_net amount=56]
</li>
<li>
[authorize_net custom_amount=true]
</li>
<li>
Some Terms Used for Deletion
</li>
<li>
Deleted Remotely : Your subscription is successfuly deleted from Authorize.net remote server
</li>
<li>
Single Delete : Shows that this subscription is deleted from your local database although still visible for a record. But could not be deleted from authorize.net because this is already deleted from there.
</li>
</ol>
Have a look at [WordPress]http://ecarobar.com/ec-authorize-net/

EC Authorize.net

EC Authorize.net is easy to use Wordpress Plugin and can be installed in just a few minutes.

Charjing For Subscription Billing vs EC Authorize.net