Star Trek: Excalibur is a campaign I was setting up to be run as an occasional episodal campaign, more structured than the Lucas game, but with more of a frontier feel than Relic or Challenger. It's set in the 2260's, when men were men, women were women and small furry creatures from Alpha Centauri . . . well, you get the idea. I hadn't done a lot with it when I abandoned it as a campaign, but I put it up mostly because I'd been tinkering around with .PDF documents as player handouts. You'll need the free Adobe Acrobat Reader software to read these files.
Caution: large file size!
Update: Further .html pages are available for both the 2260 campaign and the 2267 campaign (a year before the TOS episode The Ultimate Computer).