The Influencer Marketing Stack - Free resources to launch a killer campaign
Keyword Discovery - Keyword Discovery is a keyword research and analysis tool.
inzpire.me - An end-to-end solution for influencer marketing
GrepWords - Grepwords is an API-first Google Keyword Suggestion Tool.
Twtrland - Build your twitter presence and connect w/ influencers
iSpionage - AdWords competitor keywords with the click of a button and monitor competitor PPC landing pages.