Google Calendar - Spend less time managing your day & more time enjoying it
Business Calendar - Powerful and easy to use calendar app for Android including weather, widgets and tasks.
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
24me - Next Generation Personal Assistant
Lightning Calendar - Organize your life — it’s about time!
Calvetica - The fast calendar for iPhone. Add an event in just two quick taps.