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.

Shiv Prakash Tiwari

This free WordPress plugin allows to accept payments from credit/debit cards using Authorize.net Gateway. You can add more custom fields with any coding from wp-admin.
This allows you to add your own services lists and receive payments.
After a making payment, your customers will be receive invoice from Authorize.net. 
If you will enable send invoice option from your Authorize.net merchant account.
You can enable/disable send customer receipt setting from plugin setting option.
reCAPTCHA protects internet users from spam.
List all payments in wp-admin and print each payment receipt.

WP Service Payment Form With Authorize.net

WP Service Payment Form With Authorize.net allows to accept payments from credit/debit cards using Authorize.net Gateway with captcha.

Charjing For Subscription Billing vs WP Service Payment Form With Authorize.net