Keras - Keras is a minimalist, modular neural networks library, written in Python and capable of running on top of either TensorFlow or Theano.
Face++ - API for face detection – also detects gender, age, pose
TFlearn - TFlearn is a modular and transparent deep learning library built on top of Tensorflow.
Facesoft - The world's most accurate face recognition algorithm
Clarifai - The World's AI
Facial Recognition by FB - Get notified if someone tries to use your photo on Facebook