Cool Tool of the Week: Free Online Web Calendar

Want to include an interactive calendar with your website? Then this week's 'Cool Tool' is for you. Calendars.Net offers a free interactive web calendar hosting service. You can post events and make them visible to different groups of people, post recurring events, and even edit your calendar offline if you wish.

The catch? Ads are displayed in the calendar's footer. But if this bothers you, you can order an ad-free version for $18 USD a year.