Effin Amazing UTM Builder - Add UTM tags to your links from a Chrome Extension
Tremendous - Tremendous is a customer and employee loyalty platform that allows companies to reward their customers for surveys promotions and referrals.
UTMBuilder.net - Easiest UTM tags builder
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.
InterestExplorer - Discover 1000's of hidden Facebook interests to target.
Rybbon - Send digital e-gift cards as marketing incentives or rewards with Rybbon, which integrates with Marketo, HubSpot, SurveyMonkey, and Qualtrics.