file-mode package

Atom.io package to set syntax mode based on comment string (-- mode: MODE --).

Why?

Automatically sets the syntax highlighting mode when Atom can't properly guess it.

How?

Somewhere in the file, create a comment of this form:

# -*- mode: NAME -*-

When the file is opened, the syntax will be set to NAME, e.g. CoffeeScript, bash, etc... The matching is exact and case sensitive, caveat emptor.