The following designs are specified according to Yags SciFi ship design rules for the Traveller background.
The Vilani built to last, and some ship designs (in some cases, even some ships) date back to the First Imperium. All the designs listed here are out of license, their designs long since fallen into the public domain. Most are now constructed from standard off the shelf components, making them cheap for even low tech dockyards to build themselves. Because of this, the standard cost can be halved or even quartered unless a special variant is desired. Higher tech dockyards can build these designs at further reduced cost, dropping cost by a factor of 10 for every two tech levels.
JT-100
A small free trader equivalent design that dates back to the First Imperium. It's blueprints are now effectively in the public domain, and it is still produced at most low tech space docks in moderate numbers.
JT-130
Probably a later model of the JT-100, that initially saw production during the First Imperium. The designs have survived to the present day, and it is still built cheaply.
JT-250
Possibly unrelated to the JT-1XX designs, this is another ancient trader, but designed to carry bigger cargo between orbital stations, since it lacks planetary landing capability.
JT-500
A Jump-2 capable First Imperium design of light freighter. It lacks planetary capability, but has a reasonable cargo capacity.
E-300
A scout craft dating from the First Imperium. This 300dt ship is capable of Jump-2, and is designed for the exploration of systems around the fringes of civilised space.
Class C6 Station
A space station common throughout the Imperium. It provides limited trade, re-supply and recreational facilities.
GF-19 Orbital Defender
A light star fighter designed for orbital defence roles.