FaceAware - Image processing with the ability to focus on faces 📸👶
Photofeeler - Choose your profile photos using hard data
Facesoft - The world's most accurate face recognition algorithm
Photo Aesthetics by Everypixel - AI to rate photographs according to their aesthetic value
Face++ - API for face detection – also detects gender, age, pose
DATEnhance - upload a couple of pictures, and go on to rate others.