provy is basically divided in two namespaces: provy.core and provy.more. It is divided like this to make it easier to find the roles you need.
provy.core features the code that actually makes provy run, like the console app or the base Role.
provy.more features every single specialized role that helps users in provisioning servers, like NginxRole or AptitudeRole.
If you’re looking for all the modules tree, click here