I'm currently trying to integrate jboss-modules into Tomcat (https://github.com/hasalex/tomcat-modules), in replacement of the regular WebappClassLoader. I'm not sure to have a real use-case of that, but I think that it's a nice way to learn jboss-modules.
My first steps would be much easier if I had some more public module loaders. For example, I find the ClassPathModuleLoaderWrapper useful but it is package-private.
In fact, a lot of stuff are package-private. Jboss-modules would be much more extensible and useful with more public classes.