Tachyon - The Fringe

Devilclaw's MODs
Offers modifications, including files to change fog, lighting, multiplayer missile power up, ships, and multiplayer set-up. Contains downloads and forum.
http://www.devilsclaws.net/

FringeSpace
Project to convert Tachyon: The Fringe to the Freespace2 engine. Also offers several mods for the original game, including multiple additional ships for multiplayer, as well as maps and other media.
http://fringespace.org

Game FAQs
Contains ship guide, mission walkthrough, and gameplay tips.
http://www.gamefaqs.com/computer/doswin/game/250555.html

Game Revolution
Includes cheat codes and hints on after-burner use, and cargo salvage and sale.
http://www.gamerevolution.com/oldsite/games/codes/pc/tachyon.htm

Novalogic: Tachyon - The Fringe
Official site, with news, demonstration version, trailer, screen shots, character profiles, story, ship data sheets, features, requirements, multiplayer instructions and tips, and patches.
http://www.novalogic.com/games/TTF

Tachyon - The Web Ring
Lists fan sites.
http://o.webring.com/navcgi?ring=tachyon;list

Tachyon The Fringe Database
Features ship specifications, single player and multiplayer tips and hints, cheats, technical FAQ, forum, and fan fiction.
http://www.tachyondatabase.8k.com/

Tachyon Tips
Features tutorial including ship set-up tips, player and pirate ships, weapons and hardware analysis and tips, and forum.
http://www.angelfire.com/scifi2/tachtips/Main.html