Nodiff.vim is a project mainly written in Vim Script, it's free.
defines Nodiff command to get out of diff mode
This is a mirror of http://www.vim.org/scripts/script.php?script_id=1198
This script provides :Nodiff command, which turns off the diff mode in each window. When called as :Nodiff! it will turn off the diff mode in all existing buffers including the hidden ones.