Carlito is a font designed by Łukasz Dziedzic (@typoland) derived from Lato (also designed by Łukasz Dziedzic) that is metric-compatible with Calibri.
It comes with Latin and Cyrillic character sets.
To contribute, see github.com/googlefonts/carlito.
Please see OFL.txt
NOTE: The history of the inclusion of Carlito fonts in this repository can be found in this issue.