What are some alternatives?
When comparing OfficeCalendar and Mixmax Calendar, you can also consider the following products
Google Calendar - Spend less time managing your day & more time enjoying it
Kin Calendar - The simple and connected calendar
Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
UpTo - Life goes beyond meetings and appointments
New Google Calendar - Google is launching a new look + new features for Calendar