I don't know if there is something I'm missing about/on CPAN? Can I simply browse to see all the CGI::Application modules (the folder CGI/Application/ and it's sub-folders)?

You can browse the directory structure for CGI::Application *, but that only shows the modules that are in the default C::A install. There are several extensions on CPAN that you need to install seperately.

Just use search.cpan.org to search for related modules that are not in the default distribution.

* update: you can also walk the "modules by name" list on cpan, but IMO search.cpan.org is a lot easier to use.