InterestExplorer - Discover 1000's of hidden Facebook interests to target.
We Love Customers - Customer loyalty, reward & referral platform for e-commerce
Facebook Ad Hunter - Facebook Ad Hunter uncovers hidden audiences to target when running Facebook Ads.
Makerbook - A directory of the best free resources for creatives
AdEspresso - Optimize your Facebook Ads Easily, Like Morning Coffee
Remote Tools - A repository of handpicked tools for remote teams