Solaris 7-Perhaps the most comprehensive Fan-run site I've ever seen...Great Fan Fiction, Graphics, Custom Mechs, Weapons, ProtoMechs, Aerospace Fighters, Vehicles, and a whole lot more.

Wyldecard's Webpage-Home of the Second Kingsman Lancers! This guy has really good graphics. (Check out the Battlemaster in the Mech Bay and the Clan Vixen in the NAIS for some samples). In addition to his art gallery are unit descriptions, fiction, and stuff on the BattleTech CCG.

Rocqueforte O'Leary's RetroTech-This site has the stats and images of all the Pre-Clan Era original Mechs, vehicles, and AeroSpace fighters.

Wolf Clan-in-Exile Warrior Hall-A site dedicated to the Warden Wolves

Ham & Angst-Self styled "The best BattleTech has to offer." .

Patrick's BattleTech Archives- A veritable encyclopedia of BattleTech knowledge.