Bones Live Forever, Megan Slankard. I guess I found this song because Alex Wong linked to it.
Skeletons, Alexander Wolfe. For some reason, I'm really emotionally attached to the concept (from Guardians of the Castle, the rulesless "RPG" I played back in elementary school with Andrew Hopkins) that you can combine bones from various skeletons to make more elaborate creatures. This contributes to my love of "Skeletons decide to die by throwing bones away."
Wait For Me, Anais Mitchell. Hadestown definitely has the Hitherby nature.