WordPress + LimeSurvey = A perfect combination of blog fully capable of managing surveys.
The Surveys WordPress plugin lets you add surveys to your blog. You can let the vistors take surveys and see the result from the admin side.
The Surveys Extended WordPress plugin lets you add surveys to your blog.
Jibu Pro: the WordPress exam system.
Simple FAQ gives you ability to create very simple FAQ on your site (questions and answers)
Easily allows you to place a FormSpring.me question box on your sidebar and a shortcode to display your recently answered questions on any page or pos
Quizzin lets you add quizzes to your blog. This plugin is designed to be as easy to use as possible. Quizzes, questions and answers can be added from
Pollin wordpress plugin will let you create and add polls to your blog. It can be shown to your visitors who will be able to vote in the poll.
Create Surveys for WordPress. Inspired by the groundwork of Survey Fly, which it was previously inspired by Instinct Entertainment's Survey Creator Pl
Makes an intern game with subscrimers of your blog/site. Make pools and give to theyrs a value: users can vote in it. When you decide, close the pool.
YATCP allows you to have threaded comments (i.e. reply to existing comments) in your wordpress.