Are you a Mac user living in an Exchange world, forced to trudge through Entourage? (Don't get me wrong: Entourage is fine, but 'trudge' is just a good verb for dramatic effect.) Well trudge no longer with Groupcal 3, an addon for iCal that allows you to access, manage, edit and synchronize your Exchange calendars and tasks. Also on the feature list are: subscribing to coworker's free time, sending/receiving meeting invites, sharing/publishing calendars through .Mac or WebDAV and even syncing with an iPod or Palm through iSync.
Groupcal 3 is a Universal Binary, a demo is available and a single licenses costs $55. As you might expect, multi-license packs are available starting at 5 seats, moving all the way up to 500 and 1000 pack licenses.