Mozilla Thunderbird Portable Edition 3 Beta 3
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If you’ve tested Mozilla Thunderbird 3 beta 3 and have found it usable and safe, then get a portable copy for your USB Pen Drive and integrate it with PortableApps.com Platform 2.0 beta 1.
Downloadable in 14 different languages, Portable Edition 3 Beta 3 is just another way to test out the new features in Thunderbird 3 without altering your current Thunderbird installation.
Mozilla Thunderbird Portable Edition 3 Beta 3 is open source and completely free. You can use it on all Windows systems and in Linux with Wine.