Gramadoir.vim is a project mainly written in Vim Script, it's free.
Interface to an Irish language grammar checker
This is a mirror of http://www.vim.org/scripts/script.php?script_id=802
An Gramadoir is a command line grammar checking engine for minority languages. It is fully implemented for Irish (Gaelic) at the moment with some other languages in the works. See http://borel.slu.edu/gramadoir/ for more information.
This plugin provides a split screen interface to the grammar checker, with the text you are editing on top and a buffer containing the errors output by An Gramadoir below.
Pressing
Pressing