I want to add one more resource, Google Collaboraratory. It's a free cloud iPython notebook, and you get free usage of a K80 GPU. I'm not sure of the exact limitations just yet, but it appears you get 12 hours of GPU time per instance and can do this multiple times per month. 

This looks like a great resource for students and other non-professionals, especially for smaller jobs that you can run in half a day.

colab.research.google.com