Along with the fantastic web-browser "Firefox", the Mozilla foundation produces a lesser-known stand-alone calendaring application called "Sunbird". Sunbird is functional, standards-based, and works well with many other export formats from calendaring applications.

If you really prefer your calendar integrated with your email client so that you can, for instance, send and receive meeting invitations, they also have Mozilla Lightning, which is basically Sunbird integrated as an extension to Thunderbird. Just download Lightning somewhere convenient, then in Thunderbird go to "Tools-Extensions" and install the extension.

I use it and it works fine.

There are other alternatives, but for a person who isn't running a large enterprise around Outlook already, this is a great, free, open-source option.

I actually stopped using Mutt about six months ago. I just received too much critical email in HTML for it to continue to be convenient. I'm a Thunderbird user pretty much 100% of the time now, though I long for the simplicity of my Mutt days...

There is also Gmail, and Google Calendaring. Fact is, that option works really well for a lot of people, and you can share it with other gmail users. If you set up your existing mail account to forward to some_user@gmail.com, all your email will begin arriving there shortly. And there are tools you can use to upload your existing mail. Downside: You're hosting mail with a big company who, while their first corporate rule is "first do no evil", could revert that stance at any time...

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Matthew P. Barnson