Cancelling an application that is in the process of downloading

I have been downloading many applications, and there are a few that are so large that require WI-FI to download. I was in a restaurant that had free wi-fi and started to download a couple of those apps. However, I had to leave before they were finished. Now I have two apps that just say "loading." And I dont plan on being in a wi-fi area anytime soon. My question: Is there anyway to cancel an application while in the process of loading?