Atheist Alliance is an excellent resource base. It's tagline says it's "the only democratic national atheist organization in the United States." On the homepage you will find links to member organizations, its library, Books and Films, Freethought Directory, and many more.
Here is a sample from an article in its library:
Quote:
TITLE: Is Religion the Source of Morality?
AUTHOR: Jerry Brown
OPENING: Most religious people are sure it is, and many claim that without it we would all be savages. The evidence indicates otherwise.
CONCLUSION: A very IMMORAL thing is the captivity and degradation of the human mind, and that has been the specialty of religion since its inception.
It is possible to be quite moral without being religious. It is also possible, as history proves to be quite religious without being moral.