Event Calendar App - A simple, easy to manage, way of displaying events
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.
Plan - Plan is a better way to organize.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
Future - Calendar events around the clock
Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.