A Bibliography of Metaethics: Compiled by James Lenman at the University of Sheffield, UK.
Book of Metaethics: Metaphysical study of virtue ethics and consulting for businesses and individuals. With topical sections.
Evolution and Philosophy: Introduces Metaethical Functionalism and explores other implications of evolutionary theory for philosophy. Online academic papers, articles for the layman, and helpful links.
Kohlberg's Stages - Explained & Illustrated: Illustrations to help explain the six stages of moral reasoning and to show how cognitive dissonance can be created.
Moral Realism: A Defense: Hallvard Lillehammer reviews this book by Russ Shafer-Landau. From Notere Dame Philosophical Reviews.
Moral Responses and Moral Theory: On the metaethical role of psychological reactions, specifically emotions.