Sunrise Calendar is a smart calendar app that was designed by former Foursquare engineers to incorporate social networking and event information from Google Calendar, Facebook, and LinkedIn.
The app, which uses swipe gestures for quick switching between calendar days, offers a feed populated with Google Calendar and Facebook events, along with upcoming birthdays and daily weather information. Sunrise provides detailed information about events, such as a Facebook or LinkedIn profile of meeting attendees.
–100% free calendar app with a gorgeous design.
-Compatible only with Google Calendar for now.
-A completely redesigned calendar experience for your iPhone.
-Synchronization that just works, in real-time.
-Quick Add Event just by typing "Lunch tomorrow at 9pm" (long-press on the +).
-Timezone Support. No more headache when travelling!
-Facebook Events and Birthdays included.
-See faces of people you are meeting with using LinkedIn.
-Weather forecast based on your location.
-Tag location to events.
-Use Google Maps for Directions.
-Connect multiple Google Calendars.
Like Fantastical, Sunrise allows for colloquial language when entering events. For example, typing "Dinner with Bob at 6pm tomorrow" will schedule the appropriate event in the calendar. Sunrise uses a server component, much like Mailbox, to power its app integration and push notification system.
Sunrise Calendar is available as a free download from the App Store. [Direct Link]