Google Checkout is a Shopping cart exactly what it says on the lid I'm not sure about other checkouts.

Here are a few I found, Paypal also does a checkout and they are a very reliable company's so you may find Paypal awnsers everything. I think that's why its so highly talked about.

http://www.comersus.com/

http://www.paypal.com/cgi-bin/webscr...-intro-outside

http://www.nopdesign.com/freecart/

Good luck!

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