Photofeeler - Choose your profile photos using hard data
Face++ - API for face detection – also detects gender, age, pose
DATEnhance - upload a couple of pictures, and go on to rate others.
Facesoft - The world's most accurate face recognition algorithm
Photo Analyzer - Photo Analyzer is an app that you can use to analyze the image and object in it, which can be in the form of text or image.
Facial Recognition by FB - Get notified if someone tries to use your photo on Facebook