I have discovered a modern neo-grotesque typeface Inter
— It is free (SIL Open Font License 1.1)
— 9 styles (from Thin to Black)
— Good legibility in small sizes
— Supports Cyrillic (but it is weird).
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Somehow Inter Black reminds me of the popular Graphik typeface, but that only occurs in Black style. While the rest styles are more like a scandinavian Helvetica (a Lab Grotesque but more elegant and sophisticated I suppose).
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Now for the sad part, Inter has a weird Cyrillic.The guys tried hard — most of the Cyrillic is not very irritating to the eye, but the letters “d” and “l” give themselves away. As I understand, there are no Russian-speaking designers in the team. So I was bold enough to fix them in the Black style (kinda a stretch for my skills of a consultant).
Try yourself, which one of the letters you think is more Cyrillic (my answer is below).
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My “d” is on the left, “l” is on the right. I’m not sure if I have made it better – I’m not a designer, but personally it would be more pleasant for me to type my name in this font. Oh, and I have changed a too much helvetica-style “a” into a more grotesque one. There is nothing wrong with the former “a”, I just prefer the latter one.
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Summary: If you need a free modern legible neo-grotesque typeface with a flavour of Graphik/Hevletica/Scandinavia, then you should give Inter a try. Go grab it at https://rsms.me/inter/ or at fonts.google.com. My version of the Inter Black is here: https://www.dropbox.com/s/bsicb1e37irpj3d/Inter-Black_ABedit.otf?dl=0 (as-is, no warranties)