Kodepress

<blockquote>We are sorry to announce that, there won’t be any more development of Bullet FAQ plugin. The project is handed over to <a href="http://duogeek.com" rel="nofollow ugc">duogeek</a>. You can try the new FAQ plugin – <a href="https://wordpress.org/plugins/duofaq-responsive-flat-simple-faq/" rel="ugc">duoFAQ – Responsive, Flat, Simple FAQ</a>. Note that, if you use transalated version of the plugin, then DO NOT use it yet. You will not need to create your questions, answer and categories. They will be auto integrated.</blockquote>
Provides nice Frequently Asked Questions Page with answers hidden until the question is clicked then the desired answer fades smoothly into view, like accordion. User will have options to add categories, and questions based on those categories. Users can show question from a single category using shortcode. They will have control to change theme (among 9 themes), animation speed and custom CSS.
There is also a widget where the user can show FAQs from a category.
Don’t like any theme? You can write css in custom css box in the settings page.

Bullet FAQs

Get a beautiful accordion style FAQs for your website.

Josh Levinson

UPDATE As of 3.0.0, this plugin has the following requirements:
<ul>
<li>PHP 5.3+</li>
<li>WooCommerce 2.0.0+</li>
</ul>
If you have ever used eBay’s ‘Ask Buyer’ system before, you will know how this plugin behaves. 
WooCommerce Product FAQs allows visitors to ask questions about specific products, get answers, and view other threads. 
It also allows you, the store owner, to manually add questions to specific products.
<a href="http://joshlevinson.me/shop/flying-ninja/#tab-faqs" rel="nofollow ugc">Click here</a> for a sample WooCommerce product page with some FAQs.
<h4>FAQ Notifications</h4>
Notifications are in place that will notify the admin of new questions, with links to administer each question.
Notifications are in place that will notify the asker when their question has been answered, with links to view the product.
Each notification email has a system to highlight the question specified in the email, 
so in the case of numerous questions, the user does not have to hunt for his question.
<h4>To Do:</h4>
<ul>
<li>
Add ajax loaders where ajax is used so the user knows that their request is being processed DONE
</li>
<li>
Consider adding inline registration option to FAQ form
</li>
</ul>
<h4>Incompatibilities</h4>
<ul>
<li>
Disqus – interferes with the <code>comment_form</code> function. Will hopefully rectify this soon.
</li>
<li>
404 Redirected – strips $_GET parameters from URL, removing ‘View’ and ‘Preview’ functionality
</li>
</ul>
<h3>Developers</h3>
= Available filters: =
Format: (filter ; filtered variable ; available variables: var1 (explanation [var type]), var2, var3, …)
All filters are prefixed/begin with <code>woocommerce_faqs_</code>
<ul>
<li>
admin_faq_highlight_color ; Highlight color in the Dashboard when administering a question from the email link
</li>
<li>
front_faq_highlight_color ; Highlight color on the front-end when viewing a question from the email link
</li>
<li>
antispam_error_message ; Error message when the anti-spam check fails ; $result[‘message’] (error message [string]), posted form (full $_POST[array])
</li>
<li>
answerer_email ; Email for administering FAQs; $post_data (‘question_title’, ‘faq_author_name’, ‘product_title’, ‘question_content’ [array])
</li>
<li>
asker_email ; Email for the asker; $post_data (‘question_title’, ‘product_title’, ‘post_id’ [array])
</li>
<li>
answerer_email_subject ; Subject of administer email; same as answerer_email vars
</li>
<li>
answerer_email_message ; Final adminster message; same as answerer email vars
</li>
<li>
asker_email_subject; Subject of asker email; same as asker_email vars
</li>
<li>
asker_email_message; Final asker message; same as asker_email vars
</li>
<li>
answer_caps; Capability of answering questions
</li>
</ul>

WooCommerce Product FAQs

Extends WooCommerce to allow for the asking, answering, and viewing of FAQs in a similar experience as on marketplaces like eBay and Amazon.

Bullet FAQs vs WooCommerce Product FAQs