Google Releases Colaboratory
While you're on the waiting list: <a href="https://notebooks.azure.com/" rel="nofollow">https://notebooks.azure.com/</a><p>Supports more than Python 2.7: <a href="https://notebooks.azure.com/help/jupyter-notebooks/available-kernels" rel="nofollow">https://notebooks.azure.com/help/jupyter-notebooks/available...</a><p>(disclaimer: work for Microsoft (though not Azure)).