Modules are self powered classes that will extend your site to be more powerful and add further features to it like a Photo Gallery and so on.
This module allows you to have your own shopping (e-commerce) website where you can sale your items in different categories, attach pictures, attachments and even digital goods to them. For the items dynamic form is used so you can customize the item's details too.
This is a simple class that extends the Dynamic Form by creating a simple contact form (when installed) with "Your name", "Email address", "Question/Comments" and "Verification code" fields, and when submitted will send an email to the Webmaster's email address defined in settings.
This module allows you to share pictures on your site in a directory/subdirectory structure. You will be able to enable Ratings and/or Comments for each gallery separately, even set a limit for pictures to show/page (paginating).
This module allows you to create newsletter lists, let people subscribe to them and send out newsletter emails. It uses a double-opt-in subscription system so it should be compatible with all hosting providers' TOS.
This module allows you to create polls and gather feedback from your users. Polls support comments, pictures and even attachments.