Dwolla

Dwolla's a payment method designed to help you pay for almost anything easily. Dwolla can be used for payments between businesses, individuals, or both.

They have apps for Android, Windows Phone 7 and iOS. Sending funds is free, but it costs $0.25 to receive. That's pretty much the only fee you'll ever pay, which is already way lower than PayPal without the percentage. Everything is designed to be really straightforward, and their phone number is on the home page so you can call them if you need help. As far as PayPal alternatives go, Dwolla is an attractive option.