YesGraph - Boost viral growth by recommending who users should invite
Viral Content Marketplace - Clone & embed royalty-free viral quizzes, lists and polls
NewsWhip - Chrome extension that checks how viral your content is
VYPER - VYPR provides lead generation and capture tools.
Promo Self Serve - Launch a promotion across the internet in 90 Seconds
Zolarithm - Surfacing stories, before they go viral