WP-Answers can instantly transform your site into a full-fledged question and answer community portal. It can be used with any WordPress theme and also comes with a responsive default theme that can be viewed from tablets and smartphones. Users can login with their Facebook or Twitter account credentials and  can auto-post their question and answers to their online account.  It also has a ReCaptcha enabled sing-up procedure for new users to create an account.

The plug-in enables you to set reward points for each user action such as for submitting questions, answers, comments, upvotes and downvotes.  You can also create a leader board where users can compete with each other.

The plug-in integrates with the Yahoo Answers API allowing you to  automatically include Yahoo answers into your  site. The plug-in also has a built-in moderation tool which regulates the content posted by users in questions and answers.

It comes with free updates and support for life. Also included is a basic theme for a community site along with widgets for top users, popular questions as well as a tag cloud for easy searching.

Pricing: The WP-Answers premium WordPress plug-in is priced at $89 for the single license which includes a single default theme. The developer license is priced at$129 and comes with all current and future themes and modules along with source PSD files for easy customization.