[SgtMuffles]

Hi, I have two Mac OS X computers running Entourage and one PC using outlook 2003. I have no familiarity with either of these programs so I need a little help. Also, it's hard to get any familiarity with the GUI since the computers running entourage are almost always in use. Anyways...

We do not have an exchange server, nor do we have the resources to shell out the obscene amounts of money microsoft wants for server software. All we'd like is for all three computers to be able to have a shared calendar that all users can view and modify. Any suggestions?

[Nivag]

i'm not to familar with these but after a quick search this product is multi-platform and has a 30 day free trial.
Now Up-to-Date & Contact

or you could use iCal and publish via WebDAV or FTP - more info here - not being a PC user i have no idea of a client but there must be one.

[Thorin]

I believe Mozilla Sunbird/Calendar can read and write to an iCal calendar that's been published:

http://www.mozilla.org/projects/calendar/