Photofeeler - Choose your profile photos using hard data
Face++ - API for face detection – also detects gender, age, pose
Photo Aesthetics by Everypixel - AI to rate photographs according to their aesthetic value
How Old - How old do you look? Upload your photo to find out.
DATEnhance - upload a couple of pictures, and go on to rate others.
FaceAware - Image processing with the ability to focus on faces 📸👶