Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Lightning Calendar - Organize your life — it’s about time!
Google Calendar - Spend less time managing your day & more time enjoying it
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
SSuite My Calendar Diary - A portable calendar and diary for people on the move...