YesGraph - Boost viral growth by recommending who users should invite
Glimpse - Discover trends before they're trending
NewsWhip - Chrome extension that checks how viral your content is
Exploding Topics - Get inspirations for blog posts, startup projects, cocktail conversations and beyond on Trennd, the one-stop aggregator for emerging search and social trends.
Promo Self Serve - Launch a promotion across the internet in 90 Seconds
Google Trends - Explore Google trending search topics with Google Trends.