It is built on xPDO, which is a "helper" of sorts for database access and building robust API’s for your business logic, but Revo does not attempt to be a code library like CodeIgniter or Zend Framework; it’s a content management framework and you can bring whatever helpers you want along for the ride.
Just wondering if Revo has helpers(Text, Html, Arrays, Email etc ) similar to codeigniter or classes to handle different tasks like Encription, Ftp etc.