GameSpot - Mega Man X6 (PS1)

Offers information, a review, previews, news, movies, and cheats.
http://www.gamespot.com/ps/action/megamanx6/

ZeroOmegaRpg

Offers a real-time RPG based on the Mega Man and Mega Man X games.
http://www.angelfire.com/dragon/zeroomega/Main.html

Mega Man XZ

Provides detailed strategy guides for the Mega Man and Mega Man X gaming series.
http://mmxz.zophar.net/

The Ultimate Mega Man X and Zero Webpage

Includes Mega Man X movies, music, WinAmp skins, animated sprites, screen shots, and fanart.
http://www.classicgaming.com/ummxzw/

RockMan Ex

Resource center with official art, anime clips, sprites, and game specs.
http://www.integrity.com/homes/a2z/EXNet/EXN.htm

Megaman Inc.

Offers sprites, game guides, midis, a forum, details on upcoming titles, and ROMs.
http://www.megaman-inc.netfirms.com

Mega Man X7 Cheats

Offers cheats and codes for the seventh game.
http://www.cheatscodesguides.com/playstation-2-cheats/mega-man-x7/

Geosaur's Base

Sprites, cheats and message board for X5.
http://www.geocities.com/person_9999/MegaMan.html

Megamanxultimate's Sky Santuary

Includes information about all games in the X series along with polls, a chat room, and forums.
http://members.tripod.com/megamanxultimate26/

Xazer's MegaMan X site

Contains pictures, stories, cheats, and guides for various games in the series.
http://geocities.com/xazer2002/

Maq's Hunter Hide-Out

Features original artwork and speculation on the series' history and future.
http://www.mhho.com

Fantastic Duo: Zero and X

A fan site dedicated to Mega Man X and Zero. It has character information, fanart, stories, and a few strategies.
http://members.tripod.com/fantasticduo_x_zero/index.htm

Reploids Among Us

A choose-your-own-adventure style site, set to the driving plot of the MMX series.
http://rau.critterhart.com/

Capcom - Megaman X6

Official site. Contains game features and screenshots.
http://www.capcom.com/xpml/game.xpml?gameid=600037

Gamers Europe - MegaMan X7

Informative Article by Alix Barningham.
http://www.gamerseurope.com/article.php?id=380

IGN

Offers cheats, walkthroughs, a review, and a message board.
http://cheats.ign.com/objects/006/006872.html?ui=gamefinder

GameSpot - Mega Man X4 (Saturn)

Offers information, a review, and cheats.
http://www.gamespot.com/saturn/action/megamanx4/

GameSpot - Mega Man X5 (PS1)

Offers information, a review, previews, movies, and cheats.
http://www.gamespot.com/ps/action/megamanx5/

GameSpot - Mega Man X4 (PS1)

Offers information, a review, and cheats.
http://www.gamespot.com/ps/action/megamanx4/

eLook - Rockman X2

Quick summary of cheats and codes
http://www.elook.org/games/cheats/gbc/650.shtml