There is a compelling Polish setting for Crux Fidelis, here's a listen:

(Krzyżu święty nade wszystko)
http://www.youtube.com/watch?v=SSZgho7kn3I

Our Schola is singing it in English for Ash Wed mass tonight, here's a link for the SATB sheet music (from Choral Wiki, so it's public domain):

http://dominicanidaho.org/music/faithfu ... nglish.pdf

It's quite simple, once you get the hang of it, 'cept it always reduces me to tears...