Sites I like for CT:
- Rob Conley's excellent post on setting up a Traveller sandbox.
- Freelance Traveller, and particularly it's Other Roads (see also extending Book 2) section.
- The Citizens of the Imperium has a decent Classic Traveller section.
- Traveller Downport is something of a clearinghouse of info.
- The Missouri Archive was one of the first major websites for Traveller; there's a lot of good material there.
In addition, I've been asked to put together an annotated bibliography for Classic Traveller, of relevant science fiction. If people have suggestions, please leave them here! Thanks!