Documentation for oob native modules in IIS 7.x

Documentation for oob native modules in IIS 7.x

I've been working for some time at a super lean IIS 7.5 configuration for
a static file serving purposes web site. To achieve this, I've simply
stripped the designated web site for all dynamic modules, and only
specified native modules such as the StaticFileModule,
AnonymousAuthenticationModule, HttpCompressionModule etc.
This has already proved to cause a significant decline in the memory
footprint and processing overhead for the worker process, and the overall
performance is much better than the default web site.
Now, as a next step, I would like to see if I can trim down the number of
modules loaded into memory even further.
I could just remove the modules one-by-one and try to see how it affects
performance and functionality, but I would rather investigate what the
functionality the individual modules actually has/governs.
Some of the modules are pretty self-explanatory (ie.
DefaultDocumentModule, DirectoryListingModule), but some are not.
Is there anywhere I can find the documentation for the builtin native
modules?