Examples of websites using
Mono45
(Mono45 is a monospaced font designed by an undisclosed designer and published in an undisclosed year. It is available in multiple weights and styles)
with
Proxima Nova
(Proxima Nova is a sans-serif font designed by Mark Simonson Studio. It has a balanced and modern design, with a total of 120 individual styles including 12 weights and matching italics to suit various design needs)