Here are a collection of links to prominent, reputable paranormal organizations.
MUFON officially began on May 31, 1969. MUFON is the largest and oldest UFO organization in the world.
The Center for UFO Studies (CUFOS) is an international group of scientists, academics, investigators, and volunteers dedicated to the continuing examination and analysis of the UFO phenomenon. Their purpose is to promote serious scientific interest in UFOs and to serve as an archive for reports, documents, and publications about the UFO phenomenon.