Thunderbird addon that transforms it to behave like VIM.
Version: 0.4Muttator 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. It is similar to the Vimperator extension for Firefox.
Operating System: Mac OS X
The Muttator extension allows you to force Thunderbird behave like Vim.
Note: The Muttator addon is cross-platform and it works on Mac OS X, Windows and Linux.