Three hours into a refactor, with the terminal split four ways and a diff open in the next pane, the typeface you are staring at matters more than it did at the start of the day. Brass Mono Code is fonsecapeter's answer to that, a monospace family posted on GitHub for people who spend more time reading code than writing it. The download here includes 4 family files, so the Regular you reach for by default has siblings waiting when a comment or a header needs a different weight.

Fixed-width type does its best work where alignment carries meaning. Good fits include code blocks in developer documentation, API reference tables where the column edges have to line up, terminal and editor color schemes, and README screenshots for an open source project. Language coverage runs to 104+ Latin-based languages, which starts to matter once contributors commit comments in Polish or Turkish and you would rather not stare at fallback boxes in the middle of a line.

Sizing is where fixed-width faces need a little attention. Monospaced letterforms look loose when they get big, so if you set a section header or a talk title at 48px and up, tighten the tracking a little and check it against whatever body face sits underneath. At editor sizes, roughly 13 to 15px, leave the spacing where the designer set it and adjust line height instead. Open Font License, commercial use allowed, download below.