Electronic Transaction Association
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http://www.electran.org/

CCAvenue.com
Payment Gateway, Merchant Accounts and Online Credit Card Processing Services offered by CCAvenue, South Asia's biggest Payment Gateway and Merchant Accounts service provider. Accept Visa, MasterCard, American Express, Diners Club International and JCB cards on your website.
http://www.ccavenue.com/

Cards Technology
Offers credit card terminals, smart cards, transaction switching, transaction processing, e-payment solutions.
http://www.cardstechnology.com

Keycorp Ltd.
Keycorp offers merchants secure B2B, B2C, and payment services via the Web, Wireless applications, Call Centre applications & IVR Platforms
http://www.keycorp.net/

Sol Transaction: Real Estate Transaction Coordination
Sol Transaction provides real estate agents with reliable transaction management services by combining the skills of highly trained transaction coordinators with a customized software application.
http://www.soltransaction.com

Cleartran Electronic Bill Payment
Offers electronic and online bill payment solutions.
http://www.cleartran.com

Pay by Web
Electronic payment service provider, offers a wide array of payment options.
http://www.paybyweb.com

TranDigital.com
A payment and transaction processing consulting company.
http://www.trandigital.com/

PSiGate
Merchant accounts and credit card processing and eCommerce transaction services. Trusted online services including credit card processing services, Interac Online, fraud screening and financial account reporting.
http://www.psigate.com/

Card Management Corporation
Provides payment transaction programs for financial institutions and retailers.
http://www.cmcone.com/