UFOs and Extraterrestrials
Devoted to UFO and UFO related web sites. Many areas of Ufology are covered, including; aliens, saucers, cattle mutilations, government involvement, Area 51. Has links to UFO reports, investigations of sightings, pictures, videos. Also contains a newsgroup list, some web rings, and other UFO related information.

UFO Links
UFO research, sightings, reports, theories, merchandise, organizations. Hangar 18, Area 51, crop circles, extraterrestrials, Roswell crash.

Alien Observer
Report UFO Sightings, explore their huge information warehouse covering the UFO enigma. Lots of links, alien and UFO paraphernalia, discussion board.

Wyzyrd
General news and many UFO links.

UFO's and the Paranormal
UFO sightings and paranormal reports. Extensive portal to UFO and paranormal research and resources.

Sitchin Links
Library of links of Sitchin's writings and books, Mars connection, and web sites tracking UFO's.

Project-UFO Database & Search
UFO information with web search and Database of ufo sighting around the world.

National Investigations Commmttee on Aerial Phenomena (NICAP)
A portal of UFO evidence, research tools and links to related sites.

Alien Press Links
UFO and alien conspiracy links.

UFOs
A compendium of independently reviewed and categorized links dealing with the UFO question, also contains editorial comment and helpful micro-essays.

The Last Domain: UFO
Directory of sightings, government investigations, and information.

UFOS/Aliens from about.com Guide
Weekly features, UFO Timeline, links, latest UFO sightings, UFO sightings database, bulletin board, and chat.

UFO Skeptic's Toolkit
Contains lots of UFO material and some newsletters.