This looks fantastic and is something I've been wanting to make myself for Keras! (although this way better implemented than I had imagined)
I have a model to finish and start training tonight, will definitely try this out.
Looks gorgeous. Visualization is always an underrated activity, and I think visualizing the process of neural nets is only going to become more important for understanding what's going on around us.
Nice, I love the interface to Keras. I wrote a similar application for Caffe but my interface isn't nearly as clean.