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.
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.
Inconsolata - OSX, Productivity, Design, Typography, powerline, and Fonts
Noto Mono - OSX, Typography, Fonts, Design, and powerline
Ubuntu Mono - Ubuntu brand, app and web guidelines that help you create professional materials, software, sites, apps that build the Ubuntu brand.