Like Rene, my most-used apps of 2011 are probably the built in iPhone and iPad Safari browser, Mail app, and Reminders, Calendars, etc. via Siri. That's just the nature of the job. But since I'm TiPb's resident app editor, I also get to spend time with an incredible amount and array of App Store apps. Here are the ones I spent the most of my time with this year.