What are some alternatives?
When comparing Microsoft Hotmail and CalendarX, you can also consider the following products
Calogic - CaLogic is a feature rich, muti-user, open source web calendar.
Kin Calendar - The simple and connected calendar
Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
Google Calendar - Spend less time managing your day & more time enjoying it
Teamweek - A project management software to help you get the best overview. Plan fast, change plans faster!
UpTo - Life goes beyond meetings and appointments