FCorp ID Book - ID Book is a handy, easy to use application specially designed to offer users a simple address book.
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.
EuroOffice - EuroOffice is free and open source office software built on OpenOffice/LibreOffice.
Google Calendar - Spend less time managing your day & more time enjoying it
Redmine - Flexible project management web application
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.