Bainternet

Not long a go google implemented an instant search functionallty that show resluts as you type even before you hit the search button. 
With This Plugin you can eaily add instant search functionalty to your site or blog.
Main features:
<ul>
<li>Very easy to install.</li>
<li>Easy configuration screen.</li>
<li>simple options to style the search results.</li>
<li>extendable by hooks and filters all around.</li>
<li>Use as shortcode.</li>
<li>Use as template tag for easy integration with your theme or plugin.</li>
</ul>
any Feedback is Welcome.
check out my <a href="http://en.bainternet.info/category/plugins" rel="nofollow ugc">other plugins</a>

Simple Instant Search

With This Plugin you can  eaily add instant search functionalty to your site or blog.

Biwem inc.

Biwem Search Autocomplete brings real-time, intelligent autocomplete suggestions to your WooCommerce store. Visitors find what they’re looking for in seconds — even if they misspell, abbreviate, or only know the SKU.
The plugin is built around four ideas:
<ol>
<li>Speed. Suggestions appear as the visitor types, with multi-level caching that keeps response times low even on shared hosting.</li>
<li>Forgiveness. Built-in fuzzy matching catches typos and missing letters automatically. Searching “trapno” still finds the trapano.</li>
<li>Smart matching. Beyond plain titles, the plugin also matches product SKUs and EAN/GTIN codes, so warehouse and B2B users find products by code instantly.</li>
<li>Compatibility. Works with any theme, any WooCommerce setup, any cache plugin. No assumptions about your stack.</li>
</ol>
<h4>What’s included</h4>
<ul>
<li>Real-time autocomplete suggestions in the search box</li>
<li>Configurable number of product / post / page suggestions per query (you choose how many)</li>
<li>Multilingual smart fuzzy matching — automatic typo recovery in English, Italian, Spanish, French, and German (handles missing letters, swapped letters, vowel substitution)</li>
<li>Automatic accent normalization — café/über/straße/niño/français all matched without typing the accents</li>
<li>SKU and EAN/GTIN exact match (a customer who knows the code finds the product immediately)</li>
<li>Multi-content search — products, blog posts, and pages in a single dropdown (toggle each independently)</li>
<li>Product thumbnails in the dropdown</li>
<li>Product price display with regular/sale formatting (uses WooCommerce currency settings)</li>
<li>Loading indicator while suggestions are fetched</li>
<li>Out-of-stock filter — hide unavailable products from suggestions</li>
<li>Multi-level caching (in-memory + 10-minute transient) for fast responses</li>
<li>Translation-ready (compatible with WPML, Polylang and Loco Translate)</li>
<li>5 bundled admin languages out of the box: English, Italian, Spanish, French, German</li>
<li>Works with any theme — no required modifications</li>
<li>Drop-in shortcode <code>[wcsa_search_autocomplete]</code> with 4 design styles</li>
</ul>
<h4>Privacy-first by design</h4>
This plugin makes zero external calls. Everything runs on your own server. No data is sent anywhere — ever.
<ul>
<li>No phone-home updates. Updates come from WordPress.org.</li>
<li>No usage tracking. No statistics, analytics, or telemetry are collected.</li>
<li>No GeoIP lookup. The plugin does not look up your visitors’ country.</li>
</ul>
The plugin is fully GDPR-friendly.
<h4>Pro version</h4>
A separate Pro version with advanced features is available at <a href="https://www.biwem.it/autocomplete" rel="nofollow ugc">https://www.biwem.it/autocomplete</a>. Pro features include:
<ul>
<li>SHORTINIT fast search engine (sub-50ms response times)</li>
<li>Real-time AI chat for natural-language product discovery</li>
<li>Synonyms management</li>
<li>Search analytics with visit logs and CSV export</li>
<li>Custom colors and styling (admin color picker + 6 presets)</li>
<li>External search suggestions (Google, Bing, DuckDuckGo proxies — opt-in)</li>
<li>Configurable thumbnail size</li>
<li>Category labels and breadcrumb in dropdown</li>
<li>Focus mode on desktop (full-screen search overlay)</li>
</ul>
The Pro version is distributed exclusively from biwem.it as a separate plugin (it is not hosted on WordPress.org). The Free version on WordPress.org remains fully functional and free forever.
<h3>External services</h3>
This plugin does not connect to, send data to, or rely on any external services. All functionality runs entirely on your own server:
<ul>
<li>Product search and SKU/EAN lookups are processed locally via WordPress’s own database. No third-party APIs are involved.</li>
<li>The plugin’s REST endpoint <code>/wp-json/wcsa/v1/suggestions</code> is internal — it is served by your own WordPress installation, on your own domain, and is called only by the front-end autocomplete script running in the visitor’s browser.</li>
</ul>
No analytics, no telemetry, no tracking, no remote calls of any kind.

Biwem Search Autocomplete — Smart Search for WooCommerce

Intelligent autocomplete search with fuzzy matching and SKU/EAN. Works on any WordPress site; WooCommerce optional for product search.

Simple Instant Search vs Biwem Search Autocomplete — Smart Search for WooCommerce