Google Calendar - Spend less time managing your day & more time enjoying it
Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
CalenGoo - Features | 1.0.175 for Android™
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Jorte - Schedule books must be practical and has a good design.
iCal - In Calendar on your Mac, subscribe to calendars published or shared by others.