Daryen's Traveller Page: Gurps Traveller 1120 maps, some ship designs compliant with "GT:Starships", as well as some great other Traveller material.
GURPS Traveller: Official company website.
GURPS Traveller Ship Design: Designs for the ships mentioned in GT material.
GURPS Traveller: Maps of the Imperium: Imperial trade maps by Anthony Jackson, based upon the "Far Trader" rules.
GURPS Traveller: The Spinward Marches Campaign: A GURPS Traveller campaign set in an alternative timeline (MT like) with narrative, rules and character descriptions.
Imperial Interstellar Scout Service/Kasota Base web pages: Graphics, tools and background.
Jackson Downport!: Features various guides for converting older Traveller campaigns to GURPS Traveller.
Journal of the Travellers' Aid Society: Licensed online version of the old JTAS magazine, still edited by Loren Wiseman.
MAITLAND DOWNPORT: Startships and starports.
Omatsuri e youkoso -- Welcome to the Carnival: Some essays about GURPS Traveller by Christopher Thrash.
Sean Reed GURPS Campaign: Information on the author's campaigns, including deck plans and maps.
Spinward Marches Trade Map: Terry Mixon's Spinward sector trade map project.
Stones Throw Shipyards: Ship designs, new modules, variant suggestions, accessories and utilities.
The Future of Warfare in the GURPS Traveller Universe: An essay about suitable alterations on the GURPS Traveller roleplaying setting.
Traveller Gallery: Jesse DeGraff's illustrations for GURPS Traveller. Offers visuals of ships, both spacing and in port.
Traveller News Service: The most current article from the pen of Loren K. Wiseman, GURPS Traveller line editor.
Virvar Net GURPS Campaign: Information on the author's campaigns.