Libertinus is a typeface forked in 2012 from the Linux Libertine Open Fonts Project, which aims to create free and open alternatives to proprietary typefaces such as Times New Roman.

The Libertinus Fonts project includes four main type families: Additionally included are 3 special-use families with a single typeface each: Libertinus development is currently hosted at Github.

Like Linux Libertine before it, Libertinus Serif is a proportional serif typeface inspired by 19th century book type and is intended as a replacement for the Times font family.

The original impetus was to add an OpenType math companion to the Libertine font families.

Over time it grew into to a full-fledged fork addressing many of the bugs in the Libertine fonts.