A typeface specially designed for user interfaces with focus on high legibility of small-to-medium sized text on computer screens.
Inter UI started out in late 2016 as an experiment to build a perfectly pixel-fitting font at a specific small size (11px.) The idea was that by crafting a font in a particular way, it would be possible to get the best of both sharpness and readability.
However after a few months of using an early version of Inter UI, it dawned on everyone exposed to the test that this approach had some serious real-world problems. Most notably that it was really hard to read longer text. Because of the pixel-aligning nature of that approach, the font took an almost mono-spaced appearance, making it really easy to read numbers, punctuation and very short words, but eye-straining to read anything longer.
The project was rebooted with a different approach, this time crafting glyphs and kerning in a way that made for better usability and readability.
Inter UI is open-source AKA freebs! Please find Inter UI to download
and use generously! Needless to say - it's a personal favourite.