PayPal lets you send money to anyone with email. PayPal is free
for consumers and works seamlessly with your existing credit card
and checking account. Paypal is owned by eBay and it is definately
worth setting up an account if you use online auctions.
One of the oldest online merchants. Sign up for the free trial
and see how the system works.
Not free but a renowned worldwide system where you can sell online
quickly and most importantly safely!