Free Thinker

a person who forms opinions about Religion-s on the basis of reason, independently of tradition, authority, or established belief. Freethinkers include Atheist-s, Agnostic-s and Rationalist-s. http://en.wikipedia.org/wiki/Freethought

catholic encyclopedia http://www.newadvent.org/cathen/06258b.htm

Secular Coalition lobbying group http://www.secular.org/aboutsca.html