> What other major software has that?

Linux?

EDIT: Also Qt, MySQL, SQLite, GIMP (rather unnecessarily), ...

Somewhat disappointingly, it’s just pronounced exactly the way it’s spelled: LEE-bruh-OFF-iss

Ref: https://youtu.be/YHBve8v13VY?si=Bql2vH6C4goZN_kX

From your comment somehow I was expecting something a bit more exotic