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.
Operator - Looking for something? Make a request and we'll find it.
Noto Mono - OSX, Typography, Fonts, Design, and powerline
Bitstream Vera Sans Mono - Bitstream Vera Sans Mono Font | dafont.com
Mononoki - A new and improved version of monoOne by Matthias Tellen. More information here.
Inconsolata - OSX, Productivity, Design, Typography, powerline, and Fonts