Check out https://squareup.com/
be sure you use https and not http.
This is a great new service that lets small businesses like mine accept credit cards. My office can now accept credit cards over the phone or email, or with a swipe. The card-reading equipment is free; you do need an ipad or iphone. In the past, small businesses had just one way to accept credit cards -- Paypal, which is a confusing service (not to mention being very unfair in the way it handles disputes or problems). Square Up does take a commission of 2.75% if swiping with a credit card, and 3.5% plus 15 cents if entering a transaction manually, with no physical credit card available. Frigging amazing! Very simple to use.