Klingon Stuff.

Klingons are a fiesty Warrior Party-Animal species who have a ferocious hatred of Tribbles

The Klingon Assault Group is a fan organization of over 3,000 members who are fans of Klingons.

There is also "tlhIngan Hol," the language of Klingons. More can be learned of this by linking with the Klingon Language Institute.