Desktop Calendar Software

Is there a good free planner/calendar software?

I have a very hectic schedule, and I REALLY need a type of software I can download to put my appointments/work schedule/other activities into so I can stay organized. Is there any type of free software downloads for this that you guys can recommend?

Public Comments

1. Mozilla Sunbird is my favorite. You can create multiple calanders and color code them. http://www.mozilla.org/projects/calendar/sunbird/
2. Yes there is it is http://www.cnet.com/ you can get stuff from alarm clocks to registry cleaners.