From llost productions:
MidPay acts as a proxy between PayPal and your database. midPay integrates directly with PayPal's IPN feature to populate your database in real time with all your customer's payment and transaction information. midPay supports HTTPS, Payments, Subscriptions, E-mail Alerts, Web Alerts and more. It's easy to set up and easy to use. MidPay supports SQL mySQL and Access.