iCal Exchange

If you use Apple iCal, you should check out iCal Exchange. iCal Exhange is a free service that works with the iCal program like a .Mac account to publish and share your calendar.

After setting up an account with iCal Exchange, you can publish private calendars, which require a user name and a password to view, or public calendars. Public calendars can be viewed online by any one so friends, family members or colleagues can keep up with your schedule.

Using iCal Exchange is free, but if you want multiple passwords so people can subscribe to your private calendar without having your main account password, there is a $1 per month fee. There also appears to be plans to showcase some of the public calendars later.

One other good feature of iCal Exchange is that it works with iCal and the Mozilla calendar feature, so you can share a calendar from an iMac with someone using Windows.