Freemius

SlipFire

Steve Bruner

Improve the search functionality on your site by using Bing Custom Search for WordPress.
<a href="https://channel9.msdn.com/Events/Build/2017/T6021/player?format=html5" rel="nofollow ugc">Watch the Microsoft video ></a>
<h4>Features:</h4>
<ul>
<li>100% theme compatible: looks like your theme.</li>
<li>TABBED results (<a href="https://wordpress.org/plugins/piklist/" rel="ugc">Requires Piklist plugin</a>)</li>
<li>Auto-corrects spelling errors in searches.</li>
<li>Perfect replacement for default WordPress search or Google Custom Search.</li>
<li>Works with WooCommerce, BuddyPress and bbPress.</li>
<li>WordPress multisite compatible.</li>
<li>Get results from multiple sites, or just one.</li>
</ul>
Learn more: 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/wOXwbJhvROI?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

Bing Custom Search for WordPress

Improve the search functionality on your site by using Bing Custom Search for WordPress.

The Krotek

If you have an IPS Community Suite (former IP.Board) based forum, this extension is a must. It’ll allow your vititors to search for forum posts and topics right from your WordPress site. A lot of options, available in Premium version, will also give you full control on search process.
STANDARD FEATURES
<ul>
<li>Compatible with all versions of IPS Community Suite 4.</li>
<li>Allows you to search for IP.Board (IPS Community) content from WordPress.</li>
<li>Follows IP.Board SEF URLs structure.</li>
<li>Applies all necessary WordPress filters to search results.</li>
<li>Template independent.</li>
</ul>
PREMIUM FEATURES
<ul>
<li>Limit number of search results (useful for large databases).</li>
<li>Sort results by topic title, number of views or post date.</li>
<li>Search for exact phrase or any keyword from the list.</li>
<li>Position results before or after WordPress posts. Or even replace them!</li>
<li>Limit search by topic titles only (useful for large databases).</li>
<li>Search in member names as well.</li>
<li>Include closed topics in search results.</li>
<li>Show or hide parent Forum category before topic name.</li>
<li>Set custom thumbnail for search results.</li>
<li>Exclude forums from search results or include only certain forums.</li>
</ul>
You can purchase Premium version <a href="https://thekrotek.com/wordpress-extensions/ipboard-search" rel="nofollow ugc">here</a>.

IP.Board Search

Allows you to search for IPS Community Suite (former IP.Board) topics and posts right from WordPress.

Bing Custom Search for WordPress vs IP.Board Search