RNNVis
https://github.com/myaooo/RNNVis
https://arxiv.org/pdf/1710.10777.pdf

LSTMVis
http://lstm.seas.harvard.edu/
https://github.com/HendrikStrobelt/LSTMVis

Netron
https://lutzroeder.github.io/netron/
https://github.com/lutzroeder/netron