YesGraph - Boost viral growth by recommending who users should invite

Yotpo - Yotpo is the smartest way to generate customer content, drive traffic and increase conversions.

NewsWhip - Chrome extension that checks how viral your content is

Bazaarvoice - Putting customers at the heart of your brand lets you efficiently

Promo Self Serve - Launch a promotion across the internet in 90 Seconds

Growave - All-in-one Marketing Platform. A bundle of powerful tools for photo reviews, wishlists, loyalty programs, referrals, gift cards, and UGC.