Modifications and Add-Ons

Captain Kronos' Downtown Paintshop
Contains downloads of moth skins, skinning guide, screenshots, and pilot's guide.
http://www.kronos.org.uk/

Hardwar Enhanced at Smurphsworld
Offers downloads and documentation for UIM and Enhanced versions.
http://www.smurphsworld.150m.com/

The Hardwar Hacking Society
Contains lists of projects offering modifications to the game and explanation of file types.
http://membres.lycos.fr/hardwarhacker/

Hardwar Maps
Collection of maps and mapping resources.
http://www.capsu.org/hardwar/