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Commit Mono Font
theMage:
Commit Mono is a monospace font that you can customize in the website before you download it, to create the font that you like most (or not).
Monaspace fonts
theMage:
Monaspace is a super family of monospaced fonts that can be used for development that have some nice features, like texture healing, where the space used by each letter changes taking into account its neighbours to make the text more readable, while still complain to the monospaced grid.