LibreOffice seems to be the de facto standard for [[Open Source]] office applications. It's pre-installed on [[Ubuntu]], at a minimum, and is available for essentially everything. It provides applications for working with [[Spreadsheet]]s, documents, presentations, drawings, databases, and a couple of other things I don't expect I'll ever use.
I've played around with it in the past, it's not bad. [[Excel]] is just a super high bar to clear when it comes to "I would prefer to work with this".
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# More
## Source
- tinkering around on a [[Raspberry Pi]] and with [[Ubuntu]] in the past
- https://www.libreoffice.org