Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
Gleam - Marketing apps designed to help you grow your Business
Referral Candy - Run a fully automated, customizable and easy to integrate referral program for ecommerce.
ReferralHero - Powerful referral marketing platform for honest marketers.
RafflePress - RafflePress is the best WordPress contest and giveaway plugin. Grow your email list, followers, and website traffic with viral giveaways in WordPress.
Invite Referrals - Invite Referrals is the simplest tool to design and launch customer referral campaigns.