Erick Hitter

Creates dropdown lists of non-hierarchical taxonomies (such as <code>post tags</code>) as an alternative to term (tag) clouds. Multiple widgets can be used, each with its own set of options.
Numerous formatting options are provided, including maximum numbers of terms, term order, truncating of term names, and more.
Using the <code>taxonomy_dropdown_widget()</code> function, users can generate dropdowns for use outside of the included widget.
Only use version 2.2 or higher with WordPress 4.2 and later releases. WordPress 4.2 changed how taxonomy information is stored in the database, which directly impacts this plugin’s include/exclude term functionality.
This plugin was formerly known as the <code>Tag Dropdown Widget</code>. It was completely rewritten for version 2.0.
Follow and contribute to development on GitHub at https://github.com/ethitter/Taxonomy-Dropdown-Widget.

Taxonomy Dropdown Widget

Creates a dropdown list of non-hierarchical taxonomies as an alternative to the term (tag) cloud. Formerly known as Tag Dropdown Widget.

Code Amp

DesignsAndCode

Search & Filter is a simple search and filtering plugin for WordPress – it is an advancement of the WordPress search box.
You can search by Category, Tag, Custom Taxonomy, Post Type, Post Date or any combination of these easily to really refine your searches – remove the search box and use it as a filtering system for your posts and pages. Fields can be displayed as dropdowns, checkboxes, radio buttons or multi selects.
Links: <a href="https://free.searchandfilter.com/?utm_campaign=wordpress.org&utm_source=wordpress.org&utm_medium=docslink" rel="nofollow ugc">Search & Filter Documentation</a> | <a href="https://twitter.com/searchandfilter/" rel="nofollow ugc">Follow us on Twitter</a>
<h3>Get more features with Search & Filter Pro</h3>
<ul>
<li><a href="https://demo.searchandfilter.com/?utm_campaign=wordpress.org&utm_source=wordpress.org&utm_medium=demolink" rel="nofollow ugc">View live demo >></a></li>
<li>Search Custom Fields, Post Meta, Authors, Post Types, Post Dates, Taxonomies, Tags, Categories</li>
<li>Use AJAX to display results – no more page reloading!</li>
<li>Search Post Meta/Custom Fields with checkboxes, radio buttons, dropdowns, multiselects or comboboxes</li>
<li>jQuery range slider, date pickers and auto-complete comboboxes for selects and multiselects</li>
<li>Order Results Field – users can order results by meta value, Post ID, author, title, name, date, date modified, parent ID, random, comment count and menu order</li>
<li>Drag & Drop editor</li>
<li>Use custom templates</li>
<li>Create as many fields and different search forms as you like</li>
<li>Use for blogs, reviews sites, news sites, property sites and more.</li>
<li>Use for your online shop – tested and compatible with WooCommerce, WP eCommerce, Easy Digital Downloads</li>
<li>Place anywhere in your themes and posts using shortcodes and widgets</li>
<li>Works with WPML</li>
<li>Works with Advanced Custom Fields</li>
<li>Extremely easy to use admin UI, fully integrated with WP 3.8+</li>
<li>Dedicated Support</li>
<li><a href="https://searchandfilter.com/?utm_campaign=wordpress.org&utm_source=wordpress.org&utm_medium=textlink" rel="nofollow ugc">More info >></a></li>
</ul>

Search & Filter

Great Plugin

I use the pro version of this plugin and it is truly one of the best, most useful plugins out there. There's no bloat. It doesn't load you down with a bunch of crappy templates or anything like that. It just focuses on providing you all the options you could need for searching and filtering content and leaves the rest to you. I am always pleasantly surprised that when I want to do some weird thing with filtering I find that this plugin already has the ability to do it. 

Search Filter PRO


Excellent plugin with very good ACF support in its pro version but also a very useful Elementor integration. The support is very responsive and very helpful!Great job !


Excellent plugin with excellent support

I would love to say this plugin is awesome. I really would. It has some great functionality out of the box. I need to drop it a star and a half because it overlooks a few fundamental priorities that would be easy to fix but they don's seem to want to bother with. First, their is no way to alter the html template of the outputted form, or give you a way to segment it into sections. This creates a huge drag trying to style a single flowing list of elements <ul><li></li></ul>. This would be easy to solve and there are several requests for styling help. Second, the pro support is not very good. I was not able to find a way to contact them on my account page so came and left a review instead.

Pretty Good functionality but styling help is non-existant

Search and Filtering for Custom Posts, Categories, Tags, Taxonomies, Post Dates and Post Types

Taxonomy Dropdown Widget vs Search & Filter