Calculated Fields Form is a plugin for creating forms with dynamically calculated fields and display the result.
PayPal Button lets you collect payments, donations, and recurring subscriptions via PayPal or credit card. Customizable design and behavior.
This is for Global Gateway e4 | Payeezy Hosted Payment Page. Payeezy Made easier for WordPress users to set-up a pay button and much more on their web
Monetize your blog by selling text links using paypal subscriptions