Enhance the site so that visitors can directly interact with it or among each other, enabling things like user-generated content, comments, voting, chat, or forms for data collection and interaction.
Validation can be enabled and disabled on a content-type specific basis, allowing administrators to pick and choose what does and does not need to be validated.
With this module you can lock fields in a webform so that those fields cannot be deleted or modified except by administrators with appropriate permissions.
The Visual Website Optimizer module allows automatically includes the VWO javascript in your site's pages. Visual Website Optimizer is an easy to use A/B split, and multivariate testing tool. VWO uses small snippets of javascript inserted into the head each page to perform its tests; the Visual Website Optimizer module for Drupal automates the configuration and inclusion of those snippets.
The Visual Website Optimizer module requires an active VWO account.
Entity Registration is a flexible module for allowing and tracking user registrations for events, or just about anything you want people to sign up for. Entity Registration can be integrated with Drupal Commerce to allow fee-based registrations: sell tickets to your stuff! This module is also handy if you want to collect information along with registrations: like shoe-size for a bowling event.