Tango Card - Tango Card bundles an awesome catalog of e-gift cards and other e-rewards with easy-to-use technology and expert program support.
KOHO - KOHO is a place where you can access your money in real-time and get instant cashback.
Giftbit - Buy, send and track digital gift cards for your reward and incentive programs.
Upromise - Upromise is the cashback coupon and rebate site.
Rybbon - Send digital e-gift cards as marketing incentives or rewards with Rybbon, which integrates with Marketo, HubSpot, SurveyMonkey, and Qualtrics.
Paribus - Find out for free if online stores owe you a refund!