One thing very much worth plugging about Google Colab is that you get free access to an NVIDIA Tesla K80 GPU. You're limited to 12 hour stints and you have to

One thing very much worth plugging about Google Colab is that you get free access to an NVIDIA Tesla K80 GPU. You're limited to 12 hour stints and you have to keep the window open and network active, but it's enough that I've been able to use it to run neural machine language training (to be fair, I pass model files back and forth, training on EC2 spot instances, too).