Classic
Grimm, Jacob, and Wilhelm Grimm.  The Frog Prince, or, Iron Henry.
Isadora, Rachel.  The Princess and the Frog: Adapted from The Frog King and Iron Heinrich by the Brothers Grimm .
Ormerod, Jan.  The Frog Prince.
Tarcov, Edith.  The Frog Prince.

Fractured
Picture Books
Gwynne, Fred.  Pondlarker.
Hopkins, Jackie.  The Horned Toad Prince.
Lamm, C. Drew.  The Prog Frince: A Mixed-up Tale.
Scieszka, Jon.  The Frog Prince, Continued.

Chapter Books
McKinley, Robin.  "The Princess and the Frog" in The Door in the Hedge.
Napoli, Donna Jo.  The Prince of the Pond: Otherwise Known as De Fawg Pin.