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.

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

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

WordPress Autolead plugin for survey and lead capture.