Free iPhone Apps shakedown

A few months ago, I made a list of some iPhone Apps I thought were pretty cool, even though I don't actually use any of them. After a bit over 1-year of iPhoneage, there are the FREE apps I now use regularly, for different reasons (I only use free apps, because I'm that way). I thought I would give them a brief mention:

• Facebook - What else is there to say- it's Facebook.
  
• Free RSS Reader - An, um, free RSS reader? supports images. Awkward learning curve but once you figure it out its quite handy.
  
• WifiSpeed (web app)- Bandwidth measuring device. Because sometimes I'm just curious
  
• Remote (by Apple)- You mean you don't have this app yet?! Control your iTunes Desktop app from your phone.
  
• Flickr Sendr - upload cellphone pics straight into your Flickr account. Note: Resizes your photos, but simple to use.
  
• Lose it - Log and track your caloric intake. Largest library of products I've seen in a free app, Plus you can add your own.

There aren't all the apps I've collected at this point, but the others I don't use enough to formulate a recommendation at this time. :)

QUESTION: Any one know of an app that monitors/logs which apps you use the most/least?