Ubuntu Mono
Google Fonts · Dalton Maag · 2010

Ubuntu Mono is a humanist monospace typeface that brings warmth and personality to coding and terminal environments.
About
Unlike many coding fonts that prioritise neutrality, Ubuntu Mono retains the open apertures and friendly character of the Ubuntu family, making long sessions in text editors and terminals more comfortable. Its Cyrillic and Greek coverage is a genuine advantage for developers working in those script environments. The two-weight offering is modest but sufficient for most coding contexts.
Classification
A monospace companion to the Ubuntu family, carrying over the humanist warmth of the sans while meeting the fixed-width requirements of coding and terminal use. Cyrillic and Greek support makes it distinctive among coding fonts.