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Hermes - Pandora Client for OS X
InterestExplorer - Discover 1000's of hidden Facebook interests to target.
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
Facebook Ad Hunter - Facebook Ad Hunter uncovers hidden audiences to target when running Facebook Ads.
M for iOS - Email app with automatic encryption
AdTargeting.io - AdTargeting - #1 Free Facebook Interest targeting tool. It enables you to discover hidden or niche interests, and max the ROI of Facebook ad targeting, with millions of daily updates on keyword search and trend database.