Business Calendar - Powerful and easy to use calendar app for Android including weather, widgets and tasks.
Google Calendar - Spend less time managing your day & more time enjoying it
FCorp My Calendar - Manage diary/note, schedule, todo, birthday, etc.
WAVE Calendar - WAVE Calendar is a revolutionary app, which is designed to bring balance to your life
AnCal - AnCal stores yours appointments, tasks and notes, which you can easily add and edit.
Jorte - Schedule books must be practical and has a good design.