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.
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
AnCal - AnCal stores yours appointments, tasks and notes, which you can easily add and edit.
Calendar Lock PEA - Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.