AutoCal for Microsoft Outlook allows you to quickly and easily add items to your Outlook calendar from the main toolbar.
You simply enter the appointment details as you would "think" it, for example "3pm tomorrow Meeting with Fred". AutoCal with extract the required information and create a calendar entry automatically. The new appointment is previewed as you type in your details.
Versions available for Microsoft Outlook 2003 and 2007
The download link provided is for Microsoft Outlook 2007. Download AutoCal for Microsoft Outlook 2003
here.
Requires Microsoft .NET Framework 2.0.