Keras - Keras is a minimalist, modular neural networks library, written in Python and capable of running on top of either TensorFlow or Theano.
Machine Learning Playground - Breathtaking visuals for learning ML techniques.
TFlearn - TFlearn is a modular and transparent deep learning library built on top of Tensorflow.
Amazon Machine Learning - Machine learning made easy for developers of any skill level
Clarifai - The World's AI
Lobe - Visual tool for building custom deep learning models