System agnostic

A system agnostic computing technology (or person, in the case of system administrators and programmers) is one that does not depend entirely on the ideology of another technology, as in "OS agnostic" or "editor agnostic."

The term system agnostic is also used in role-playing games to describe scenarios and supplements (or persons, in the case of players and gamemasters) which can be used within a variety of gaming systems and settings.