2006
emlx to mbox Converter
by nhoizey (via)This tool will convert your individual emlx mail files (found in ~/Library/Mail/) to the old mbox format, used by almost every UNIX/Linux mail client and recognized by many more.
Apple Mail plug-ins and tools
by FredB & 10 othersA repository of plug-ins and tools that extend the functionality of Apple's Mail.app
2005
2004
Technical Jiggery Pokery: Thunderbird's Extreme Mac-over
by roberto & 1 otherMac theme for Thunderbird.