*U* UFO Database: UFO maps and statistics from over 18,000 filtered sightings worldwide, for all dates.
Alien51: Report sightings and view them. Includes discussion boards for a variety of paranormal related topics: aliens, ghosts, conspiracy theories, and the paranormal in entertainment.
Arizona UFO: Arizona UFO, Phoenix lights, unexplained sightings, and phenomena in Arizona.
Kecksburg PA UFO Incident: A petition for information disclosure regarding the Kecksburg Pennsylvania UFO incident.
Massachusetts UFO Resources: A comprehensive source for information on UFOs in Massachusetts, including sightings, and report databases.
Project Hessdalen: In the area of Hessdalen, Norway, a luminous phenomenon was occurring with strong recurrence. The Project Hessdalen is a scientific research project for the study of the phenomenon. [English/Norwegian]
The UFO Organisation: Concentrates mainly on sightings and how to report them, but also has general UFO information.
U F O Nut: This site contains pictures and descriptions of historic UFO sightings and annotated links to current UFO observers.
UFO India: Reports UFO sightings, SETI, paranormal phenomenon in India. Also publishes articles, and news on related subjects.
UFO Map: The Empty Quarter of the Sea: Out of 18,100 UFO sightings in the *U* Database, none fall within a huge area of sea shown on this map.
UFO Over Whixley North Yorkshire 1977: Description of a UFO sighting over Whixley, near York, North Yorkshire, UK in May 1977.
UFO Sightings Over New England: A collection of UFO reports regarding the 6 New England states of New Hampshire, Vermont, Rhode Island, Maine, Massachusetts, and Connecticut.
UFOrce: Flying saucer reports and alien encounters. The extraterrestrial hypothesis is explored.
UFOs Over America: Dedicated to information about UFO sightings, photos, stories, encounters, links.
Unexplainable UFO Pictures And Information: Reports, sightings and an interactive supernatural message board.