A cookbook used as a base role which will pull in other cookbooks. On it's own, it really should do absolutly nothing except include other cookbooks.
A cookbook which provides helper methods that streamline various attribute related workflows. A few of the highlights include loading environment attributes from (potentially encrypted) databags, support for attribute namespaces, secrets management and attribute blacklisting.
A cookbook which performs various standard linux system configuration tasks such as setting the hostname or the timezone as well as installing packages.
A cookbook which will manage users, groups, openssh and sudo.