FameBit - Easiest Way to Find, Hire, and Work with YouTube Influencers
Addmefast - Building a website or network on Internet is no longer a hard task but promoting and marketing it is still a difficult task but not impossible.
inzpire.me - An end-to-end solution for influencer marketing
LikesPlanet - Get Facebook likes, Twitter Followers, YouTube Subscribers, Comments, and Shares.
Insense & Paid Media - Find creators for short-term and long-term partnerships
Linkcollider - Link Collider is a web-based service that is designed to grow your online business, social media networks, and personal blogs.