Nathan Osman

If you’ve written a question or answer on any Stack Exchange site and you would like to share it with your readers, you are no longer limited to pasting a static link. Instead, StackTack will embed a live widget with the contents of the question and some of the top rated answers.

StackTack

StackTack is a JavaScript widget that displays questions from Stack Exchange sites.

Evgeniy Kutsenko

This Plugin allows you to include a simple Textbox through which your site visitors can ask you short questions. 
You can answer them through the backend. 
This plugin is not a dependent version of the plugin <a href="https://wordpress.org/plugins/askme/" rel="ugc">Ask Me</a>.
See it in action at: (<a href="http://wp.starcoms.ru/qa-plugin/" rel="nofollow ugc">http://wp.starcoms.ru/qa-plugin/</a>)

Simple Q&A

Simple Plugin to let your users ask questions.

StackTack vs Simple Q&A