A really simple PayPal plugin.
PayPal Responder processes payment for a product via PayPal, then sends an email responder to the customer and returns them to a URL of your choice. That's it.
You can use it to sell any type of product/s on your website. There is no cart, checkout process or anything complicated - it just lets the user buy a single product in 1 click, then returns them to a URL of your choice, and emails them the auto-responder.
Let's say you're selling an eBook. User clicks "Buy" button > user is directed through PayPal checkout > once checkout it completed user is returned to a thank you URL and emailed the eBook.
I developed this plugin for a usage similar to above example. I didn't want a fully fledged eCommerce system, and many other solutions include Add to Cart and then whole heap of other stop screens that hindered the transaction.
Get Pro Version if you need the following advanced features: