Best Free E-Mail: Mozilla Thunderbird

As easy to use as Outlook Express (and in many ways better), Mozilla Thunderbird comes from the same folks who brought you the Mozilla browser. It has all the tools you'd expect, including the ability to handle multiple e-mail accounts from a single interface, create rules for funneling e-mail into folders, and color-code messages for easier sorting. Thunderbird even has a built-in spam filter, though you have to train it before it recognizes any junk. You'll have to do without niceties like an install program or live tech support, but I can put up with that.