Having calendars on your smartphone, laptop, desktop, and/or the internet may be helpful but can get cumbersome to keep them all synchronized.  Calgoo connect is a free solution that allows you  to sync multiple calendars from multiple programs(Apple iCal, Google Calendar, Outlook 03/07, and 30 Boxes). It supports:

• Attendees and attendee status
• Invitations
• Reminders
• Tags and categories
• Timezones
• Recurrence and recurrence exceptions
• Event level privacy settings
• Free/busy

Check it out at the Calgoo connect website.