iOS/Mac: Wouldn't it be nice to have a personal assistant flesh out your meeting notes with additional research and resources? Dunno attempts to replicate this convenience on any Apple device.
All you have to do is open Dunno, jot down a quick note, then wait a few moments. Each note will be automatically augmented with relevant images, web links, Wikipedia articles, videos and more. It won't attempt to outright answer a question like Wolfram Alpha or Siri, but it might save you a few moments of searching through various web services.
Your notes and links are automatically synced across the Mac, iPad and iPhone apps, all of which are free from their respective App Stores.