Cvsvimdiff is a project mainly written in ..., it's free.
cvs diff + vimdiff
This is a mirror of http://www.vim.org/scripts/script.php?script_id=1209
Perform cvs diff invoking vimdiff.
This script does not aim at supporting cvs as vimscript #90, it simply enables people acquainted with "cvs diff" to see its output in a handier way.