How can I delete a pgrm completely?

Guys,
I am seriously drawing a blank right now. I am trying to think of the name for the bar that runs across the top of the screen that includes Spotlight. Anyways, I downloaded some anti-spam software and now I want to delete it. When I search for it using Spotlight, I don't get any results but the icon still shows up there between my bluetooth icon and my MobileMe icon. How can I delete this pgrm completely?