Xc2iCal - Make the Microsoft Exchange Calendar available to the Mac OS X iCal application
Version: 1.0 BetaXc2iCal is a free app which reads your cached Microsoft Exchange (IMAP) account, extracts the calendar data and represents the result as a calendar subscription in iCal.app.
Operating System: Mac OS X
If your subscribing your Exchange account via IMAP or the Exchange dialog to you Mail.app on Mac OS X (tested with Leopard), Mail.app is caching all your folders on the Exchange server.
Xc2iCal will read exactly this cached data from your mailbox cache, generate an iCal calendar and work as a small web server presenting this iCal calendar for subscription to iCal.app.
NOTE: Check the author's page for detailed usage instructions.