Zimbra is an open source server and client technology for next-generation enterprise messaging and collaboration.

If I ever find the time, I’d love to evaluate this for my office. They so desperately need to get weaned off of Microsoft Exchange server… but they just don’t know it yet. I wonder if I can try this out with my little group of people called my family? Hmmm. There is a Mac OS X edition available to download, but the last I checked the Ajax interface wasn’t supported on that platform (really strange).