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Fira Code - A font derived from Fira Mono with added ligatures.
M+ 1m - Download and install the M+ 1m free font family by M+ Fonts as well as test-drive and see a complete character set.
Noto Mono - OSX, Typography, Fonts, Design, and powerline
Bitstream Vera Sans Mono - Bitstream Vera Sans Mono Font | dafont.com
Liberation Mono - Liberation Mono is a font family showing compatibility for metrics with Courier New, Times New Roman, and Arial.