Dr. Sam Hardy, an associate professor of psychology at Brigham Young University, describes the branches of moral psychology that emerged in the wake of Lawrence Kholberg's theory of cognitive moral development.
Video about Kholberg's theory of moral stages
Richard Shweder's three ethics
Moral foundations theory website
Jonathan Haidt's "The emotional dog and it's rational tail: A social-intuitionist approach to moral judgement"
Turiel & Nucci's Social Domain Theory
Dan Lapsley's book, Moral Psychology