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Also VisiData is an excellent TUI spreadsheet.

One of my favorite tools. However, I don’t think that Visidata is a spreadsheet, even though it looks like one and is named after one. It is more spreadsheet adjacent. It is focused on row-based and column-based operations. It doesn’t support arbitrary inter-cell operation(s), like you get in Excel-like spreadsheets. It is great for “Tidy Data’, where each row represents a coherent set of information about an object or observation. This is very much like Awk, or other pipeline tools which are also line/row oriented.

For CLI tools, I’m also a big fan of Miller (https://github.com/johnkerl/miller) to filter/modify CSV and other data sources.

Forgive me for promoting this that I wrote:

csvquote: https://github.com/dbro/csvquote

Especially for use with existing shell text processing tools, eg. cut, sort, wc, etc.

I would add xan to this list: https://github.com/medialab/xan

But of course, I am partial ;)

aaand xsv : https://github.com/BurntSushi/xsv

xan is a maintained fork of xsv