The Delta Fleet
The Delat Fleet is the main fleet site of the Scoperta. If you wish to join the Delta Fleet go here.
Star Trek.com is the offical star trek website.
LCARS Computer Network
The LCARS Computer Network is a great fan site.
Trek Fic Terminal
The Trek Fic Terminal is a fan fiction site with not just Trek fiction. It's run by the same people that run this site. Check it out.