lato CC0-1.0 Lato high-quality open-source font family

Lato is a sanserif type­face family designed in the Summer 2010 by Warsaw-based designer Łukasz Dziedzic (“Lato” means “Sum­mer” in Polish). In December 2010 the Lato family was published under the open-source Open Font License by his foundry tyPoland, with support from Google. In 2013 – 2014, the family was greatly extended to cover 3000+ glyphs per style. The Lato 2.010 family now supports 100+ Latin-based languages, 50+ Cyrillic-based languages as well as Greek and IPA phonetics. In the process, the metrics and kerning of the family have been revised and four additional weights were created.

http://www.latofonts.com/