As a parallel to my question about Useful stock SQL datasets, I wonder if anyone has come across a library/web page/wiki/etc. that contains stock SQL data models. For example, the problem of maintaining table(s) for login credentials is faced by countless developers. Are any of you aware of a data model that provides a best-practices implementation of this table? What about other use cases? I'm thinking about things like inventory control, sales reporting, application events (login, logout, viewing a given page or item, etc.). I came across a great resource at databaseanswers.org, but wonder if there are any other resources I should take a look at.
As with my question on data sets, I'm looking for things that can readily incorporated into an application, fulfill a generic need that many developers have, and something that is not specific to a single industry or business sector. Address books, login credential tables, messaging, etc. all fall into the criteria I'm thinking about.
Any thoughts?