The Influencer Marketing Stack - Free resources to launch a killer campaign
Rep - Influencer marketing made easy
Twtrland - Build your twitter presence and connect w/ influencers
Mention ✪ Influencers Dashboard - Identify the influencers talking about your company
inzpire.me - An end-to-end solution for influencer marketing
Top Instagram Influencers Ranking - Curated directory of Instagram bloggers by country&category