E3 is optimized for Authorize.Net, which in our experince is the best. However the following can be used (there may be an installation charge for some of them - please contact the development team).

 1. Payment systems
   2. CentiPaid :: http://centipaid.com
   3. E-Dinar :: http://www.e-dinar.com
   4. E-Gold :: http://www.e-gold.com
   5. Money Bookers :: http://www.moneybookers.com/app
   6. NetPay :: http://www.netpay.tv
   7. Nochex :: http://www.nochex.com
   8. PayPal :: http://www.paypal.com
   9. PayPal Website Payments Pro :: http://www.paypal.com
  10. World Swift :: http://www.worldswift.com
  11. Credit card processors ::
  12. 2Checkout. Version 2 :: http://www.2checkout.com
  13. 3Delta Systems :: http://www.3dsi.com/products/eclinx.html
  14. AccessPoint :: http://www.apc.net
  15. ANZ eGate (CommWeb) :: http://www.anz.com/anzegate
  16. ANZ eGate Merchant-Hosted :: http://www.anz.com
  17. AuthorizeNet: AIM ::
  18. AuthorizeNet: SIM ::
  19. Bank of America :: http://www.bamart.com
  20. Bank of Asia :: http://www.bankasia4u.com/index.htm
  21. Bean Stream :: http://www.beanstream.com
  22. BiBiT :: http://www.bibit.com/
  23. BluePay :: http://bluepay.onlinedatacorp.com
  24. Caledon :: http://www.caledoncard.com
  25. Cambist :: http://www.cambist.com
  26. Cardia Shop :: http://www.cardia.no
  27. Censeo (dialog) :: http://www.censeo.se
  28. Censeo (no dialog) :: http://www.censeo.se
  29. Clear Commerce (PayFuse) :: http://www.clearcommerce.com
  30. Credomatic :: http://www.credomatic.com
  31. CyberCash :: http://www.verisign.com/support/cyberCash
  32. CyberPac (LaCaixa) :: https://www3.lacaixa.es/avisos/eng.html
  33. CyberSource :: http://www.cybersource.com
  34. DataTrans :: http://www.datatrans.ch
  35. DeltaPAY :: http://www.deltasingular.gr/index.asp
  36. Direct Payment Solution: PX POST :: http://www.paymentexpress.com
  37. DirectOne direct :: http://www.directone.com.au
  38. E-Gateway (Mantis Technologies) :: https://egateway.com.au
  39. EasyPay :: http://www.telemoneyworld.com
  40. ECHOnline :: http://www.echo-inc.com
  41. EFSnet :: http://www.concordefsnet.com
  42. ePDQ :: http://www.epdq.com
  43. eProcessingNetwork. Transparent. :: http://www.eprocessingnetwork.com
  44. eSec.Direct :: http://www.esecpayments.com.au
  45. eSec.ReDirect :: http://www.esecpayments.com.au
  46. eSelect Plus :: http://moneris.com
  47. eWAY. Shared payment :: http://www.eway.com.au
  48. eWAY. XML payment :: http://www.eway.com.au
  49. Ezic. Direct mode V3.x :: http://ezic.com
  50. EZTP :: http://eznp.com
  51. FirePay :: http://firepay.com
  52. GestPay :: http://www.sella.it
  53. Go Charge It :: http://www.ecommerce.com
  54. GoEmerchant :: http://www.goemerchant.com
  55. GoEmerchant XML :: http://www.goemerchant.com
  56. Google Checkout :: http://checkout.google.com (additional fee may apply)
  57. GZS:Paymaster :: http://www.gzs.de
  58. HeidelPay :: http://www.heidelpay.de
  59. HSBC Secure E-Payment Service :: http://www.hsbc.com
  60. iDeal ::
  61. iDeb :: http://www.ideb.se/iDeb
  62. Innovative E-Commerce :: http://innovativegateway.com
  63. IntelliPay: ExpertLink :: http://www.intellipay.com
  64. InternetSecure :: http://www.internetsecure.com
  65. IO*NGATE :: http://www.iongate.com
  66. iTransact XML scheme :: http://www.itransact.com
  67. Jettis :: http://billingservices.com
  68. LinkPoint :: http://www.linkpoint.com
  69. Lynk Systems :: http://lynk-systems.com
  70. MerchantPartners :: http://www.merchantpartners.com
  71. MultiCards :: http://multicards.com
  72. MultiPay :: http://multipay.net
  73. NetBanx :: www.netbanx.com
  74. Netbilling :: http://www.netbilling.com
  75. NetRegistry e-commerce :: http://www.e-commerce.netregistry.com.au
  76. Ogone :: http://www.ogone.com
  77. Ogone (web) :: http://www.ogone.com
  78. Pasat Internet :: http://www.4b.es
  79. PayBox :: http://www.paybox.com
  80. PayGate :: https://www.netkauf.de
  81. PayGateway (Paradata Systems) :: http://www.paygateway.com/tech
  82. Payment Express Hosted payment page :: http://www.transfirst.com
  83. PayNet :: http://www.paynet.no
  84. PayFlow Link :: http://www.paypal.com
  85. PayFlow Pro :: http://www.paypal.com
  86. PayPro :: http://payments.3-tier.com
  87. PaySystems :: http://www.paysystems.com
  88. PaySystems Client :: http://www.paysystems.com
  89. PayWeb :: http://www.paygate.co.za
  90. PayZip.Net: Web2Web :: http://www.payzip.net
  91. PlugnPay. Remote Auth method :: http://www.plugnpay.com
  92. PlugnPay. Smart Screen method :: http://www.verisign.com/support/cyberCash
  93. Protx VSP Direct :: http://www.protx.com
  94. Protx VSP FORM :: http://www.protx.com
  95. ProxyPay3 :: http://www.eurobank.gr
  96. PSiGate :: http://www.psigate.com
  97. PSiGate XML interface :: http://www.psigate.com
  98. PSW Billing :: http://pswbilling.com
  99. RTWare: ADC Direct Response :: http://www.rtware.net
 100. SaferPay :: http://www.saferpay.com
 101. Scopus :: http://www.scopus.com.br
 102. SECpay :: http://www.secpay.com
 103. Secure-I :: http://www.secure-i.com
 104. SecurePay :: http://www.securepay.com
 105. SECURETRADING :: http://www.securetrading.com
 106. SkipJack :: http://www.skipjack.com
 107. Slim CD :: http://slimcd.com
 108. Smart people :: http://smartpeople.com
 109. SmartPag :: http://www.smartpag.com.br
 110. SurePay. Merchant payment. :: http://www.surepay.com
 111. TotalTrans :: http://totaltrans.net
 112. Transaction Central. POST Interface :: http://www.primerchants.com
 113. Transaction Central. WEB Interface :: http://www.primerchants.com
 114. Transaction Central. XML Interface :: http://www.primerchants.com
 115. TransFirst eLink (Server based solution) :: http://www.transfirst.com
 116. Triple Deal :: http://corporate.tripledeal.com
 117. Trolley Gateway :: http://ipbill.com
 118. TrustCommerce :: http://trustcommerce.com
 119. USAePAY :: http://www.usaepay.com
 120. uSight :: http://usight.com
 121. VaultX :: http://www.globalpoint.com.au
 122. Velocity Pay :: http://www.velocitypay.co.uk
 123. viaKlix :: http://www.viaklix.com
 124. viaKlix 2.0 :: http://www.viaklix.com
 125. WebCraft :: http://www.webcraft.com.mt
 126. Wells Fargo :: http://www.wellsfargo.com
 127. WorldPay :: http://www.worldpay.com
 128. YellowPay :: http://www.postfinance.ch/yellowpay
 129. YourPay :: https://www.yourpay.com
 130. ZipZap :: http://www.zipzap.co.nz
 131. Cheque processors ::
 132. AuthorizeNet.eCheck :: http://www.authorize.net
 133. HeidelPay.Cheque :: http://www.heidelpay.de
 134. PayByCheck :: http://www.paybycheck.com
 135. PayByCheck.XML :: http://www.paybycheck.com
 136. WTS bank :: http://www.wtsbank.com/man_trans