iSynCal is built to synchronize events and todo from iCal calendars between two or more Mac computers using the standard Apple File Sharing shipped with Mac OSX. Using iSynCal, you no longer need a .Mac account neither to publish your calendars on an external FTP or WebDav server.

You can even use iSynCal to sync your iCal calendars with your iPod or between multiple users on the same Mac.