I've been following along, and this course has been great so far. The author also has made the code for one of his publications about image captioning publicly available: https://github.com/karpathy/neuraltalk

Along with various other nice work about neural networks:

http://cs.stanford.edu/people/karpathy/convnetjs/started.htm...

http://cs.stanford.edu/people/karpathy/recurrentjs/

http://karpathy.github.io/neuralnets/

Nice visualization about classifiers from the class (various svm, softmax):

http://vision.stanford.edu/teaching/cs231n/linear-classify-d...