The form generator is based on the J! way of generating forms.
For input data can be sent via e-mail. Even captcha is included and can be inserted - if wished.
The form generator mod_qlforms is based on the Joomla! xml. Any parameter (calendar, text email etc.) is at your service. Form fields provided by Joomla! are here: http://docs.joomla.org/Category:Standard_form_field_types