Including fun polls on your website is one way to engage your visitors and encourage them to come back for more. There are plenty of paid polling services around. Democracy Poll for WordPress is a simple plugin that lets you add your own custom polls to your site. Your visitors can even add new answers.
Democracy Poll makes it easy to add new choices for each poll. You can allow your visitors to choose multiple answers. Want to limit voting only to registered members? No problem. Webmasters can also choose how the answers are sorted from the backend.
To add polls to your site, simply choose the appropriate shortcode for each one. This is a free plugin.