FameBit - Easiest Way to Find, Hire, and Work with YouTube Influencers

Reddit - Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.

Assmb.ly - Powered by intelligent technology, we’re delivering the content readers need, exactly when they need it, across four dynamic brands (and counting).

Contextly - Contextly provides content recommendation system for publishers.

inzpire.me - An end-to-end solution for influencer marketing

Digg - Digg delivers the most interesting and talked-about stories on the Web right now.