You bet. I built ReviewNB[1] specifically for Jupyter Notebook code reviews.

There's also,

- nbstripout[2] for stripping outputs automatically before every commit

- nbdime[3] for diff'ing notebooks locally

- jupytext[4] for converting notebooks to markdown and vice-a-versa

[1] https://www.reviewnb.com/

[2] https://github.com/kynan/nbstripout

[3] https://github.com/jupyter/nbdime

[4] https://github.com/mwouts/jupytext