Inconsolata-g
I use the free Inconsolata font (by Raph Levien) to program and as shell font, and I like it a lot.
16 Alternatives To Inconsolata-g
DejaVu Sans Mono
This open source font family is derived from the Bitstream Vera family, itself close to the Microsoft core Web fonts (see Andale Mono).
Inconsolata
OSX, Productivity, Design, Typography, powerline, and Fonts
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.
Monoid
Monoid is a customizable, minimal + legible font optimized for coding. It’s customisable with ligatures, alternates and class based positioning.
Roboto Mono
Making the web more beautiful, fast, and open through great typography
Terminus
Terminus is an account based marketing platform for B2B marketers.