GAMES WORKSHOP™

The creators of Epic miniatures and the various rule systems. They support the 4th version of the rules (EPIC Armageddon).

EPICOLLECTOR™

Creates and maintains the largest photo gallery of Epic models on the web.

STONE GRAPHICS™

Creates wargaming aids that can be used for 6mm science fiction games.

Forgeworld

This company has many talented sculpters that produce resin models and terrain for epic. They also produce many detailed 40K scale models of titans and superheavy tanks:

Iain Werry's Website Epic40K.co.uk

CyberShadow has this great site supporting Epic 40,000, Epic Armageddon, and Battlefleet Gothic. This site also has a forum for discussions! Worth a look!