I have recently reduced the links to bare minimum and most of the links lead to catalogs with links which are more up-to-date than mine.
eMerchandise - The world;s largest TV & movie studio store
Amazon.com - Books, CDs, DVDs, Videos, Computer Games
Amazon.co.uk - same as above, for Europe
AllPosters.com - The world's largest poster and print store
Fox X-Files site - The official X-Files Web site
Yahoo! - Television Science Fiction and Fantasy > The X-Files
Google Directory - Science Fiction and Fantasy > X > X-Files, The
Open Directory - Science Fiction and Fantasy: X: X-Files, The
IMDb - X Files, The (the movie)
IMDb - "X Files, The" (the series)
The Ultimate X-Files Information Complex - Fan reviews, Tom McCown's breviews, mythology guide
The X-Files 101 - Who's Who, Episode Guide, Writers, Directors, Glossary, Q&A
The X-Files In-Jokes List - A list of the inside-jokes
The Official Gillian Anderson Web Site - Always up-to-date
David Duchovny - DuchovnyNet - For David's fans
Idealists Haven - Haven Community forum
Deanx.com - Official Home of Dean Haglund (currently down)
SciFi.com - The X-Files - TV currently showing The X-Files
TNT - The X-Files - Another network currently showing The X-Files
InsideTheX - Transcripts of all episodes in HTML and PDF format
This is an Internet mailing list for The X-Files, run by Chael Hall, which discusses the episodes currently being aired in North America. To sign up for the list, send a message to email@example.com with "SUB X-FILES". To receive the digested form, use "SUB X-FILES-DIGEST" instead. For more information, send a mail to the above address stating "INFO X-FILES" in the message. To get a FAQ type "GET X-FILES faq" in the body of the message.
X-Files Tape Duplication
Maillist that was set up to provide free copying of The X-Files episodes on videotapes to the X-Philes. Send blank mail with subject "xf tapes request" to get the most recent version of the list of offered tapes. All tapes are provided free of charge, just for shipping.