[kibwen]

Few (none?) of the ancient "web-safe fonts" are permissively licensed. And nice-looking fonts that look good on all OSes and that have a large set of glyph coverage are quite expensive to make (though I'm sure Google/Microsoft/Apple could afford it).

[simcop2387]

Google does sort of do this with the Droid family of fonts. https://fonts.google.com/specimen/Droid+Sans They're not perfect though, but it is a start. I think one or two of Apple's might be permissively licensed also but I'm not certain.