I wish to put in a plug for Noto Sans Semicondensed for spreadsheets, although not generally for system-wide use.

I recommend it for my Tonto2 List Maker script, which uses a spreadsheet layout. Noto Sans Semicondensed has “tabular figures,” which means you can use it in tables to align digits and decimals with simple spaces and still have the look of a proportionally spaced font for text.

Noto Sans Semicondensed is available from Google, of course, but Linux Users will be more likely to install the fonts-noto-core package.