Some of my favorites:
FU-UK
TMP
Ainsty and Old Crow Resin goodness!
Two-Hour Wargames ATZ and 5150!
Flagship Games HHH!
Endgame! My flgs!
Aaron Brown Sculptor. The Quar and other random oddbits!
Drew Williams Sculptor. Responsible for most of the ghouls here!
Litko Every size and shape of miniature base you might need!
Gloire An excellent rule system for the would be Swashbuckler!

Miniatures companies that get loads of my cash:
Infinity
Copplestone
Perry Twins