AffiliateWP - A powerful affiliate marketing solution for WordPress.
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
ReferralMagic - Turn your users and customers into referral magnets.
Referral Candy - Run a fully automated, customizable and easy to integrate referral program for ecommerce.
Everflow - Partner Marketing Platform - Track, Analyze & Automate
InviteBox - Acquire new customers with a social referral program. InviteBox is a flexible referral marketing solution that brings you new customers at no cost.