What's your favorite android running app?

I really love Nike Plus on my Ipod, but my husband dropped the Ipod in the sink the other day, so now I don't have one anymore. Instead of buying a new one, I'm trying to find an app that does much of what Nike Plus does and maybe even more for my Android phone. I want to track miles, calories, pace, personal bests, etc. Also, I want one that doesn't have a monthly fee. I don't mind buying an app if it is a good one, but I don't want to have to pay a monthly fee for certain features (i.e., Runkeeper). Help!