jCalendarCopy 1.19 for Mac can be downloaded from our website for free. The program is included in Productivity Tools. The actual developer of this free Mac application is Kenai.com.
From the developer:
jCalendarCopy will copy or shadow iCal calendars from MacOSX to a Sun Java System Calendar Server. It includes support for timezone changes and repeating events. It is not a synchronization service. This Mac OS application has an easy to use interface.
You may want to check out more software for Mac, such as PitStop Extreme or FileOpenInstaller, which might be related to jCalendarCopy.