I use Google Calendar because it sends me SMS alerts for upcoming events, and also is pretty easy to use, on the other hand most of my work and other useful tasks are stored on Outlook, which include official calendar events, meeting reminders and more.

Google Calendar is definitely a great service and having [...]

The Calgoo team has decided to make the full version of Calgoo 2.0 free. Calgoo is a desktop calendar management application for Windows, Linux, and OS X. It allows you to manage your calendar, and synchronize it with Google Calendar, Outlook (2003 and 2007), 30 Boxes, and iCal. Not all of the Calgoo features work  [...]

Firefox is really becoming a power house for us, and the number of useful and productive extensions crop up everyday. Google Calendar is by far one of the best event organizing service we have used, and what better way than to club it with one of best applications that keeps us productive.
We usually setup Google [...]

Google provides users with a bunch of services to users which include email, contacts, calendar, news, notebook and more. Accessing each of these services would require you to open multiple sites or tabs to access each of the service.
But like Google Talk you can access all the Google services in your Firefox sidebar using the [...]

google has finally made its calendar service avialable.

text recognition - in adding an event, or detecting a new event from gmail, calendar automatically detects event-specific words and suggests the adding of a new event with data auto-structured.

manage multiple calendars - set up multiple calendars (work, personal, etc) and view them separately or together.

heavy gmail integration [...]

another product is out from google's stable, they have now forged their way into calendar's too.
here are some exclusive screen shots from tech crunch.
this release is only avialable to very private network of google beta testors for now.