Duoc Nguyen

OpenSearch is a collection of simple formats for the sharing of search results.
Simply, This plugin help you to make browser’s addressbar become your search form. After install this plugin, you go to yout website onetime, after that, you open tab, and type you url, then press “tab” key. tadaaa…
Feature:
<ul>
<li>Admin Setting Page supported</li>
<li>Insert Searc metatab on your page’s head.</li>
<li>Add rewrite for opensearch.xml</li>
</ul>
<h4>Cộng đồng wordpress Việt Nam</h4>
<ul>
<li><a href="https://laptrinh.senviet.org" rel="nofollow ugc">Sen Việt</a></li>
<li><a href="https://www.facebook.com/pages/Wordpress-Vi%E1%BB%87t-Nam/1531229807110426" rel="nofollow ugc">Facebook page</a></li>
<li><a href="https://plus.google.com/112246631672323028789?prsrc=5" rel="nofollow ugc">Google plus</a></li>
</ul>
<h4>Dành cho nhà phát triển</h4>
Hướng dẫn : <a href="http://laptrinh.senviet.org/wordpress-plugin/viet-plugin-them-opensearch-vao-wordpress/" rel="nofollow ugc">VIẾT PLUGIN THÊM OPENSEARCH VÀO WORDPRESS</a> 
Github : <a href="https://github.com/senviet/355_wp_Opensearch" rel="nofollow ugc">Source code on Github</a>

WP Opensearch Advance

Add Open Search to your website has never been so easy.

Matthias Pfefferle

The plugin creates an OpenSearch Document for your blog.
It supports Google Chromes <a href="https://www.chromium.org/tab-to-search" rel="nofollow ugc">“Tab to Search”</a> and <a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/chrome_settings_overrides" rel="nofollow ugc">“search_provider” WebExtension</a>, Firefox’ <a href="https://developer.mozilla.org/en-US/docs/Web/OpenSearch" rel="nofollow ugc">“OpenSearch plugins”</a>, Safaris <a href="https://developer.apple.com/library/content/releasenotes/General/WhatsNewInSafari/Articles/Safari_8_0.html" rel="nofollow ugc">“Quick Website Search”</a>, and <a href="https://support.microsoft.com/en-us/microsoft-edge/change-your-default-search-engine-in-microsoft-edge-cccaf51c-a4df-a43e-8036-d4d2c527a791" rel="nofollow ugc">“custom searches”</a> for Microsofts Edge browser.
From the <a href="http://www.opensearch.org/Specifications/OpenSearch/1.1" rel="nofollow ugc">spec</a>:
<blockquote>
Search clients can use OpenSearch description documents to learn about the public interface of a search engine. These description documents contain parameterized URL templates that indicate how the search client should make search requests. Search engines can use the OpenSearch response elements to add search metadata to results in a variety of content formats.
</blockquote>
Other integrations and extensions:
<ul>
<li>Extension links for <a href="http://www.opensearch.org/Specifications/OpenSearch/1.1#Autodiscovery_in_HTML.2FXHTML" rel="nofollow ugc">HTML</a>, <a href="http://www.opensearch.org/Specifications/OpenSearch/1.1#Autodiscovery_in_RSS.2FAtom" rel="nofollow ugc">Atom and RSS</a></li>
<li>Autodiscovery via <a href="https://wordpress.org/plugins/xrds-simple/" rel="ugc">XRDS-Simple</a>, <a href="https://wordpress.org/plugins/host-meta/" rel="ugc">host-meta</a> and <a href="https://wordpress.org/plugins/webfinger/" rel="ugc">WebFinger</a></li>
<li><a href="http://www.opensearch.org/Specifications/OpenSearch/1.1#Examples_of_OpenSearch_responses" rel="nofollow ugc">RSS and Atom search responses</a></li>
<li><a href="http://www.opensearch.org/Specifications/OpenSearch/Extensions/Suggestions/1.0" rel="nofollow ugc">OpenSearch Suggestions extension</a></li>
</ul>

Open Search

This plugin is easy to use. Install it and it works :)

Do what it should

Maybe an gif animation for the visitors which is linked to a desccription howto use would be nice.
i would like to translate to german.

thanks for the update, why not used on more webpages?

Create an OpenSearch Document for your blog.

WP Opensearch Advance vs Open Search