http://www.authorizenet.com/

http://www.instabill.com/

http://www.moneris.com/index.php

http://www.worldpay.com/

http://www.chronopay.com/

http://www.westpac.com.au/internet/publish.nsf/Content/PB+HomePage

http://www.bluepay.com/

https://www.viaklix.com/

http://www.ematters.com.au/

http://www.plugnpay.com/

http://www.eway.com.au/

http://www.goemerchant.com/

http://www.skipjack.com/default.aspx

https://ws1.eigendev.com/mira/

http://www.netaxept.no/netaxept/sp_default.asp

http://www.directone.com.au/html/welcome/

http://www.cybersource.com/

http://www.nab.com.au/

http://www1.netbanx.com/

http://www.networkmerchants.com/

http://www.nochex.com/

https://www.deltapay.gr/

http://www.eprocessingnetwork.com/

http://www.protx.com/

http://www.securepay.com.au/

http://www.itransact.com/

http://www.securetrading.net/

http://technocash.com/

http://www.2co.com/

http://www.usaepay.com/

http://www.egateway.com.au/

http://www.intellipay.com/

http://www.paystation.co.nz/cms_display.php

https://www.paypal.com/

http://www.payjunction.com/

http://www.beanstream.com/website/index.asp

http://payitatpost.auspost.com.au/

http://www.securepay.com/

http://www.secpay.com/secpay/index.php/secpay.html

http://www.paymate.com.au/

http://www.paybycheck.com/

http://www.planetpayment.com/US-Default.aspx

http://www.gotmerchant.com/

https://paytrace.com/

http://www.cyberbit.com/

http://www.aciworldwide.com/

https://www.alertpay.com/

http://dandomain.dk/

http://www.mygate.co.za/

http://www.netcash.co.za/

http://www.rabobank.nl/

https://www.myvirtualmerchant.com/VirtualMerchant/

http://www.quickbooksmerchantservice.com/

http://www.elementps.com/

Famous ones

1. Paypal (Global)
2. Authorize.Net (US)
3. Verisign (Global)
4. Linkpoint (US)
5. 2Checkout (Global)
6. WorldPay (Global)
7. CyberSource (US)
8. Protx (UK)
9. EWay (AU)
10. Moneris (CA)
11. QuickBooks Merchant Services (US Only)