eSkeletons is a great website produced by the Department of Anthropology at the University of Texas at Austin. eSkeletons features interactive models of mammal skeletons. Select a model from the menu on the home page then click on any bone in the model to view it in detail. After select a bone to view you can choose from a menu of viewing angles. In many cases eSkeletons offers a short video display of the bone you've selected from the menu.
eSkeletons gives students the option to compare bones across models. Select two or more animals from the menu then select a bone and a small gallery of comparative images will be generated. eSkeletons offers a glossary of terms and a legend to help students understand what they are viewing. Even without the models, the glossary is a good resource for anatomy students.