Extensive new Free Variable Font Family -- Inter

Check out this well-constructed variable font family and download for free (but consider a payment to the designers). The following text is quoted from their website:

Inter is a typeface carefully crafted & designed for computer screens.

Inter features a tall x-height to aid in readability of mixed-case and lower-case text. Several OpenType features are provided as well, like contextual alternates that adjusts punctuation depending on the shape of surrounding glyphs, slashed zero for when you need to disambiguate "0" from "o", tabular numbers, etc.

and see also a useful resource list of 70 free fonts…

Uncle Sam is Your Type (supplier)

It seems like everyone is getting in on typefaces: Alibaba one day, the US Government the next. Public Sans is a multi-weight open source sans with a strong presence. Students of type design will notice Public Sans’ debt to Franklin, a seminal American type design.

Two Fine Free Font Offerings

When IBM commissioned a typeface family for their own internal use, they also released it for general use. Clean and practical, Plex also has some style and warmth. With sans, serif and monospaced subfamilies and many weights, one might wish that many businesses relying on dull typefaces such as Arial and Times New Roman might make the switch and use something much better for free.

“With four subfamilies, eight weights, two styles (roman & italic), and 100 Languages, IBM Plex™ can do just about anything you need it to. Just download, add to your font manager, activate and enjoy.”

Another free offering, Overpass is not quite a grand as Plex, but with eight weights and true italics, it is a fine and generous offering. Very smart and highly readable, and more space efficient than Plex.

Free and Nearly Free Fonts

Hundreds of websites cater to the Internet's limitless appetite for free typefaces. Only a few restrict themselves to high quality fonts. Font Squirrel is one such, and Lost Type allows users to pay what they want for their font of choice. Some of the Font Squirrel offerings have multiple weights, and a few are issued by commercial type designers, such as Plex, a huge font family commissioned by IBM.