It looks like Microsoft has (rather quietly) added a few new additions in terms of Zune HD apps. The newly released apps include Windows Live Messenger as well as a trio of games to include WordMonger, Dr. Optics Light Lab, and Castles and Canons. All said and done, while it is still nice to see new apps coming available for the Zune HD it kind of feels a little late. Of course, I suppose if you are still sporting a Zune HD and have been itching for apps than this will be good news. In that case, hit up the Zune Marketplace and add these latest to your collection along with the Facebook and Twitter apps.