Common Business Application Patterns

I’m wondering if there are any resources or references for common business problems in software.

For example, the problem of having to create a content management system is well understood and there are many implementations. I am curious if there is a resource that maps out how a typical CMS works from data model to application architecture.

Some other examples that I’d hope to find are SASS implementations, abstracted business rule systems, document management, page/functionally permission implementation – typical issues that come up when building software.