As you can see, the Hymnary has an ever-growing list of hymnals. But this is barely the tip of the hymnological iceberg. It's easy to add your favorite hymnal to the Hymnary. Instructions are available to lead you through the process and there's an online group supporting those who are adding and editing hymnals.
By now you've probably poked around the Hymnary enough to know that it is a powerful tool for researching and enjoying hymns. "Is there anything," you ask, "that the Hymnary doesn't do?" Well, here's one: the Hymnary doesn't grant licensing permission.
The Hymnary is updated frequently. Subscribe to this feed if you want to know when fresh materials come online and learn about new features at the site.