CICAP http://www.cicap.org/en/
The Italian Committee for the Investigation of Claims on the Paranormal, promoting a scientific and critical enquiry of supposed paranormal and mysterious phenomena.
North Texas Skeptics http://www.ntskeptics.org/
An organization devoted to promoting the use of science and rational thinking in viewing the world. Features events, newsletter, cartoons, and articles.
Tampa Bay Skeptics http://www.tampabayskeptics.org/
A nonprofit scientific and educational organization that critically examines paranormal and fringe-science claims and publishes a quarterly newsletter.
Triad Area Skeptics Club http://www.wfu.edu/~ecarlson/tasc/
North Carolina group dedicated to the critical evaluation of claims of the paranormal. Located in the Piedmont Triad of North Carolina. Articles, events listing, and discounted books section.