Muttator is a free browser add-on for Thunderbird, which makes it look and behave like the Vim text editor. It has similar key bindings, and you could call it a modal mail client, as key bindings differ according to which mode you are in.
LicenseFree
File Size358.64 kB
Version1.1
Operating System Windows 7 Windows XP Windows Vista Windows
System RequirementsMozilla Thunderbird 3.3a1