http://r-typography.com/17_sul-mono/

Sul Mono is a geometrically constructed monospaced family of five fonts. It is the fixed width version of Sul Sans, a typeface with features observed in capital letters on signs and buildings in Portugal. Sul Mono’s glyphs width is the standard, so it takes the exact same horizontal space as popular monospace fonts, like Courier or Andale Mono. The name Sul (South), hints to a southern european flavour on a typically northern style of typeface.