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.
Best Referral Programs - A curated directory of startup referral programs
Trackier - Performance Marketing Software
GrowSurf - Referral software for B2C, FinTech, and SaaS companies.