The following tales are similar to the Donkeyskin fairy tale, AT-510B, "Unnatural Love." I have included the English language tales of this type which have been gathered by title by D. L. Ashliman in his A Guide to Folktales in the English Language. Sometimes I include tales of other classifications when I deem them relevant to the theme. The tales come from many cultures and are similar to the Donkeyskin story in various ways. I have placed the tales in alphabetical order with bibliographic information and links to texts of the stories if a text is available on the internet.
In 1892, Marian Roalfe Cox compiled Cinderella: Three Hundred and Forty-five Variants of Cinderella, Catskin, and Cap O' Rushes, abstracted and tabulated. This rare book is now available on SurLaLune. While the tales are only provided in abstracts and tabulations, the common themes across the variants make an interesting study. See especially the Catskin variants to compare with the Donkeyskin tale.
Also see the tales of AT-510: Cinderella, of which Donkeyskin is a subvariant, on SurLaLune at Tales Similar to Cinderella.