This is really neat: https://feature-engine.readthedocs.io/en/1.0.x/

It's a Python library that makes it easy to engineer features. The library provides shortcuts for things like one-hot encoding, missing data, and so on... Looks like it could help a lot of people, especially if you use Scikit-learn.

Thanks Michelle, that's really cool. There's also featuretools.org, though I haven't used it myself.