Basically Contact form Solution pack has the backend functionality that you are looking for. It is prebuilt and allows for you to have a contact form easily integrated into your site by specifying a few variables.
You can modify the form on the contact form page using CSS Form Builder. Form builder visually creates the forms using CSS, but has no backend handling of the form when it is submitted.
The way the two work together is that you can use the backend functionality of sending the information with Contact Form Solution Pack and redesign the form's look and feel using CSS Form Builder.