PaySquare в Android Market

PaySquare (v. 1) Разработано Michael Kantor

PaySquare scans a specifically-defined QR Code and sends information to the PayPal app in order to make a payment.

http://zxing.appspot.com/generator can be helpful for creating QR Codes. Plain-text QR Codes encoded in a format similar to this will be accepted by PaySquare and forwarded to PayPal:
user@server
1.23USD

The author of this app is not resposible for how it is actually used, it simply passes data from one app to another.