I’ve been using the Inter typeface on this blog (and other things) for 1½ years now.* I love it.
Rasmus [Andersson, the designer of Inter] did some research and experimentation and eventually realized there was no free, high-quality text typefaces for computer UIs. That felt backwards to him given how type heavy many UIs are. So he set to work creating one and released the first set of glyphs in August 2017. He’s been iterating on it continuously ever since.
What I really admire about Inter is the way it looks brilliant at both small sizes and large sizes. There really are not many typefaces you can say that about.
It also feels like it has genuinely been designed for our time, while seeming familiar like Helvetica or Univers. While those classics fall down somewhat as digital typefaces (no surprise given how old they are), Inter manages to improve on other digital-first typefaces like Roboto.
Incredibly, while Roboto has the might of Google behind it, Inter is one person’s side project. I have a lot of admiration for this project.
* Yes, that was just an excuse to use the ½ glyph.