grosbouff

Pencil Wiki is a simple wiki solution for your WordPress.
Basically, it adds new roles & capabilities that allow your users to add/edit wiki pages (custom post type).
It comes with several widgets and custom templates (that you can override) fully integrated with the Twenty Twelve theme.
Pages are edited backend, but there is a menu on every wiki page with the necessary links; and a wiki index / search input.
Only Administrators and Editors can create new wikis (top-level pages); and Wiki Authors can add pages to it. 
Administrators and Editors can also LOCK some wiki pages (for any reason) or branches; which means they will not be editable anymore by other users.
I voluntarily made the plugin quite simple to avoid making it intrusive (javascript, css, …) and put too many features. I recommend to run it with those plugins : 
* <a href="https://wordpress.org/extend/plugins/member" rel="ugc">Members</a>Members by Justin Tadlock, to manage roles and capabilities 
* <a href="http://mtekk.us/code/breadcrumb-navxt" rel="nofollow ugc">Breadcrumb NavXT</a> by John Havlik, to generate breadcrumbs 
* <a href="https://wordpress.org/extend/plugins/simple-footnotes" rel="ugc">Simple Footnotes</a> by Andrew Nacin, to put footnotes in your wiki pages.
WordPress has a revision system, which is perfect for a wiki. 
Unfortunately, I didn’t find a way to customize it (add revision messages, etc).

Pencil Wiki

Pencil Wiki is a simple wiki solution for your Wordpress.

Ajay

WebberZone

<a href="https://webberzone.com/plugins/knowledgebase/" rel="nofollow ugc">Knowledge Base</a> makes building a knowledge base or FAQ for your WordPress site easy, fast, and scalable.
Whether you need a simple FAQ page, a full self-service help center, or a structured multi-product wiki, Knowledge Base scales to fit. Organize articles into products and sections, customize permalinks, and let your customers help themselves: no coding required.
Perfect for:
<ul>
<li>Multi-product companies managing multiple help centers</li>
<li>SaaS platforms with self-service documentation portals</li>
<li>Ecommerce support centres reducing ticket volume</li>
<li>Documentation hubs and internal company wikis</li>
<li>Developers building customer-facing knowledge portals</li>
</ul>
<a href="https://webberzone.com/support/knowledgebase/" rel="nofollow ugc">Live Demo</a>.
<h3>Powerful features available in the Free version</h3>
<ul>
<li>Unlimited Knowledge Bases: Support as many products as you like, with unlimited sections and sub-sections.</li>
<li>Beautiful, Responsive Layouts: Ships with clean templates powered by the Responsive Grid System.</li>
<li>Customisable Permalinks: View your KB at /knowledgebase/ by default or change the base slugs for articles, sections, products, and tags. Advanced custom permalink structures with dynamic placeholders are available in Pro.</li>
<li>Shortcodes + Gutenberg Blocks: Add KB listings anywhere using [knowledgebase] or use the Knowledge Base block.</li>
<li>Built-in Breadcrumbs: Improve UX and SEO with breadcrumb navigation.</li>
<li>Widgets Included: WZKB Articles, WZKB Sections, WZKB Products, and WZKB Breadcrumbs widgets.</li>
<li>Built-in Caching: Speed up your Knowledge Base without extra plugins. Configurable cache expiry settings are available in Pro.</li>
<li>Multilingual Ready: Full WPML and Polylang compatibility — translate articles, sections, products, and tags; language-aware caching and widgets included out of the box.</li>
<li>Auto Table of Contents: Automatically generate a linked Table of Contents from article headings, with configurable depth and minimum heading threshold.</li>
<li>Live Search Suggestions: Show accessible AJAX search suggestions as visitors type in the Knowledge Base search form.</li>
<li>Related Articles: Display related articles at the bottom of KB articles based on categories and tags.</li>
<li>Alerts: Add attention-grabbing alert boxes with the [kbalert] shortcode or Alerts block.</li>
</ul>
<h3>Pro features</h3>
<a href="https://webberzone.com/plugins/knowledgebase/#pro" rel="nofollow ugc">Knowledge Base Pro</a> enhances the plugin with advanced features for larger documentation sites, including ratings and feedback, a help widget, a powerful custom permalinks engine, premium layouts, enhanced TOC surfaces, and additional admin tools.
<ul>
<li>Article Rating & Feedback System: Collect binary or 5-star feedback with optional follow-up questions, admin alerts, Bayesian sorting, and GDPR-friendly tracking modes.</li>
<li>Help Widget: Offer an in-app support hub with live search, suggested articles, and a contact form inside a floating assistant.</li>
<li>Custom Permalinks Engine: Craft advanced URL structures for articles, sections, tags, and products using dynamic placeholders.</li>
<li>Knowledge Base Homepage Mode: Display the Knowledge Base on your site homepage. The Knowledge Base URL becomes the homepage and the Knowledge Base archive URL redirects to the homepage.</li>
<li>Premium Layout Pack: Unlock seven additional frontend styles (Modern, Minimal, Boxed, Gradient, Compact, Magazine, Professional).</li>
<li>Enhanced Table of Contents: Three Pro TOC delivery surfaces — a sidebar widget that renders the TOC for the current article, a Gutenberg block to insert the TOC inline, and a floating/sticky panel that follows the reader down the page.</li>
<li>Advanced Admin Tools: Control knowledge base caching with expiry settings, on-demand cache clearing, and other productivity enhancements.</li>
</ul>
<h3>Key Concepts</h3>
<ul>
<li>Articles: Custom post type <code>wz_knowledgebase</code>: your FAQs, how-to guides, and documentation.</li>
<li>Products: Custom taxonomy <code>wzkb_product</code>: link articles to one or more products.</li>
<li>Sections: Custom taxonomy <code>wzkb_category</code>: organize content neatly into categories.</li>
<li>Tags: Optional <code>wzkb_tag</code> taxonomy: make finding content even easier.</li>
</ul>
<h3>Contribute</h3>
If you have an idea, I’d love to hear it. WebberZone Knowledge Base is also available on <a href="https://github.com/WebberZone/knowledgebase" rel="nofollow ugc">Github</a>. You can <a href="https://github.com/WebberZone/knowledgebase/issues" rel="nofollow ugc">create an issue on the Github page</a> or, better yet, fork the plugin, add a new feature and send me a pull request.

Knowledge Base

The plugin is great, it comes with everything that you need for a good knowledge base. Using it with Ultimate Member will give you the ability to control visibility of articles and other stuff.

Everything that you need for a good knowledge base

Build a multi-product knowledge base for WordPress. Reduce support tickets with self-service docs, FAQs, and a built-in help center.

Pencil Wiki vs Knowledge Base