TheGrumpyDeveloper

This plugin allows users to host their own IPN listener on their wordpress install. It will connect to the email service via the API and allow the user to map a 
paypal button to an active campaign list. The pro version of the plugin will allow users to map multiple buttons to multiple lists. Currently just Active Campaign is supported but in the next version, will be adding Mailchimp and other popular providers.

Bridge – Paypal to Email Lists

This plugin allows users to map their paypal buttons to email campaign lists in Active Campaigns (and soon mailchimp and others)

misiek303

Plugin allows you to generate paypal buttons with IPN verification. 
Buttons can be added to the posts or pages using syntax string to content body. 
Also all buttons are available as widgets. Configuration of button allow to use IPN verification. 
Paypal transaction are viewable in plugin page from menu admin.
Usage:
Syntax [mp:id=button_id]
UPGRADES or BUG FIXING:
FOR v1.1.20090324
<ul>
<li>added view cart button</li>
<li>change a way to store buttons type</li>
</ul>
FOR v1.1.20090321
<ul>
<li>added currency code to generate buttons</li>
</ul>
To update the plugin, overwrite your old plugin files with new version, then deactive and active plugin again. 
You won’t lose your existing buttons. This will add another table which keeps all additional options, in this case currency code. 
Currency Code filed will show up on Generate PayPal Buttons page. 
Please let me know with any issues. Goodlock!

Misiek Paypal

Plugin allows you to generate paypal buttons with IPN verification.

Bridge – Paypal to Email Lists vs Misiek Paypal