The MFS Survey plugin lets you add surveys to your website

The Simple Poll is a voting poll system into your post, pages and everywhere in website by just a shortcode. Add poll system to your post by placing shortcode.

Wedgies are polls that you can embed in your WordPress site and templates.

WordPress Autolead plugin for survey and lead capture.

Add a Poll, Survey, or Quiz Plugin to your WordPress site. Create a poll, quiz, or survey from scratch or based on templates.

WP Poll Maker is a FREE to use WordPress poll plugin helps you to create responsive, customizable and professional poll and voting contests for your WordPress website.