Tomorrow I will be getting my first smart phone (iPhone 4), and I was wondering what photography related apps you guys use and/or think are good? I don't really mean the kind that edit pictures or add funny features, but rather for business or convenience, that kind of thing. One thing I am looking forward to is using either Evernote or Dropbox to have a catalog of poses, lighting setups, etc. that I like and can look up anywhere I happen to be. What do you find you use the most?