The CCAvenue API v2 payment gateway module is available in WHMCS.
The legacy CCAvenue module is available for accounts that use CC Avenue's older system.
ChronoPay was available through WHMCS 8.6.
The E-Gold payment gateway module is available in WHMCS.
The E-Path payment gateway module is available in WHMCS.
The F2B payment gateway module is available in WHMCS.
Gate2Shop is a payment gateway module in WHMCS.