Your WordPress site comes with Gravity Forms installed. Gravity Forms is a plugin that allows you to quickly create forms within your site to collect data. Creating a form does not require you to have any programming experience. These forms can email you or other people or store the information within WordPress.
Gravity Forms has a well-documented user guide on their site.
For advanced alternative layouts, check out CSS Ready Classes.
When updating a Gravity Form in the form editor, your changes may not display. Until this bug is repaired by the plugin creator, you should click 'refresh' or click 'Form Editor' after each time you 'Update Form' to refresh the form editor. If you do not do this, your changes may be lost after a subsequent 'Update Form' click.