MUFON

Mutual UFO Network   
Parent organization for this site

http://www.mufon.com 

CUFOS

Center for UFO Studies

http://www.cufos.org

FUFOR

Fund for UFO Research

http://www.fufor.com

BUFORA

British UFO Research Association

http://www.bufora.org.uk

National UFO Reporting Center

http://www.ufocenter.com

Intruders Foundation

http://www.if-aic.com