http://freeldssheetmusic.org/

I have found some very good music on this site even though I don't agree with the LDS beliefs fully. As long as you read through the music to check for accurate doctrine, it's a good site to use. And free. You can't beat free!

Just recently I found a choir piece for my church to use for a seasonal choir. We're going to be starting rehearsals for Reformation Sunday I'm really excited to get a group going again!