Facebook Ad Hunter - Facebook Ad Hunter uncovers hidden audiences to target when running Facebook Ads.
Startup Stash - A curated directory of 400 resources & tools for startups
Grade My Ads - Score your Facebook ads + improve them, in seconds.
The Influencer Marketing Stack - Free resources to launch a killer campaign
InterestExplorer - Discover 1000's of hidden Facebook interests to target.
Makerbook - A directory of the best free resources for creatives