Kaggle's Facial Expression Recognition Challenge: https://www.kaggle.com/c/challenges-in-representation-learning-facial-expression-recognition-challenge. Pylearn: https://github.com/lisa-lab/pylearn2. scikit-learn: http://scikit-learn.org. pycaffe: http://caffe.berkeleyvision.org. Theano: http://deeplearning.net/software/theano. Torch: http://torch.ch. UC Irvine Machine Learning Repository: http://archive.ics.uci.edu/ml.