Three Trek-themed apps, actually: The first is a really good reproduction of the Next Generation tricorder display that has semi-authentic sound effects and a lot of great interactivity.
The second is SpaceBlaster which is a soundboard with some sounds you may find familiar…
Finally, out today is Kirk’s Communicator, which is a reproduction in iPhone form of the classic Star Trek communicator (flip top open and everything).
Ah, my geek fu is strong with these new apps… now if only the Tricorder really worked, you’d have something…