Searching for software that does Preparing/Cleaning/Engineering data

Dear fellow machine learner,

I am looking for a tool, may it be SaaS, On-Premises or Open Source that will allow me to visualize, manipulate data easily.

The features I'm mostly interested in: Show distribution of variables Show visualizations between two variables or more (maybe adding conditions e.g. (where var<1) Simple imputation of missing values Modifications of numeric/categorical data e.g. (if var<0, var==0) Easily create new features by splitting/concatenating columns Find impurities in variables Being able to concatenate by row or by column Any other quick matric / dataframe operations...

I found this tool: dataiku that does most of these things but it's 299 €/mo.

I will appreciate any recommendation that even responds partially to the features I mention above.

Thanks!

cheeeech