Feature-engine
Another Python library focused on feature engineering, but Skrub additionally provides integrated tools for exploration and multi-table pipeline validation.
pandas-profiling / ydata-profiling
Specializes in data exploration reports, whereas Skrub combines exploration with cleaning and feature engineering.
scikit-learn preprocessing tools
Offers pipeline building and preprocessing but does not natively support dataframe-specific operations or multi-table scenarios as Skrub does.