Google: Google Now

Google Now is an intelligent personal assistant developed by Google. It is available within the Google Search mobile application for the Android and iOS operating systems, as well as the Google Chrome web browser on personal computers. Google Now uses a natural language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of web services. Along with answering user-initiated queries, Google Now proactively delivers information to the user that it predicts they will want, based on their search habits.

Google Now is implemented as an aspect of the Google Search application. It recognizes repeated actions that a user performs on the device (common locations, repeated calendar appointments, search queries, etc.) to display more relevant information to the user in the form of "cards". The system leverages Google's Knowledge Graph project, a system used to assemble more detailed search results by analyzing their meaning and connections.

Specialized cards currently comprise:

• Activity summary (walking/cycling)
• Boarding pass
• Concerts
• Currency
• Developing story and breaking news
• Events
• Event reminders
• Fandango
• Flights
• Friends' birthdays
• Hotels
• Location reminders
• Movies
• Nearby attractions
• Nearby events
• Nearby photo spots
• New albums/books/video games/TV episodes
• News topic
• Next appointment
• Packages
• Parking location
• Places
• Product listing
• Public alerts
• Public transit
• Research topic
• Restaurant reservations
• Sports
• Stocks
• Time at home
• Time reminders
• Traffic and transit
• Translation
• Weather
• Website update
• What to watch
• Your birthday
• Zillow

Reference:
Google Now
http://en.wikipedia.org/wiki/Google_Now