Dont really need a plugin, you could add this to your functions.php in your theme directory.
Code:
function short_title($after = '', $length) {
$mytitle = get_the_title();
if ( strlen($mytitle) > $length ) {
$mytitle = substr($mytitle,0,$length);
echo $mytitle . $after;
} else {
echo $mytitle;
}
}
then call it from your template
Code:
<?php short_title('...', 40); ?>
40 being the characters for the title, and ... being after the title.