Society for Psychical  Research  The first organization established to examine allegedly paranormal phenomena using scientific principles

Parapsychology Research in Great Britain

American Society for Psychical Research

Paranormal Investigation Society of Toronto

Museum of Talking Boards, an excellent site on the Oiuja Board

American Association of Electronic Voice Phenomena

Ghost Hunting Equipment from ParanormalGhost.com

Spiritualist Churches

Film of Ghosts, Spirits, and Poltergeists