BPOTechHue

Single Taxonomy Selector provides an intuitive interface for selecting taxonomy terms in WordPress. It offers the ability to:
<ul>
<li>Select a single parent term.</li>
<li>Select one or multiple child terms under the chosen parent.</li>
<li>Ensure only one term selection at a time, similar to radio buttons.</li>
<li>Customize selection modes to suit your content management needs.</li>
<li>Set options via an easy-to-use options page.</li>
</ul>
This plugin is perfect for use cases where structured and controlled taxonomy term selection is necessary, such as categorizing content, filtering, or organizing hierarchical taxonomies.
For more information, visit <a href="https://bpotech.com.vn/" rel="nofollow ugc">BPOTech</a>.
<h4>Features</h4>
<ul>
<li>Supports all hierarchical taxonomies</li>
<li>Allows selection of one or more different terms</li>
<li>You can select 1 parent term and 1 child term or 1 parent term and multiple child terms.</li>
<li>Various selection modes for flexible control.</li>
<li>Easy-to-configure options page.</li>
<li>Seamless integration with custom taxonomies.</li>
<li>User-friendly interface.</li>
<li>Works with Classic Editor.</li>
</ul>

Single Taxonomy Selector

A powerful plugin that simplifies taxonomy term selection by enabling users to select a single parent term and its child terms with flexible selection …

rigreference

Solar conditions play a crucial role in HF-propagation conditions. RigReference.com has a widget showing the current conditions based on NOAA data. This data can be used by ham radio operators to determine the best time to make long-range communications on shortwave bands (160 to 10 meters). 
But this widget required you to edit your templates and add a little javascript snippet to them.
With this WordPress widget you can now add the solar widget to your blog easy and simple.

RigReference HF-Propagation conditions

The widget displays Solar and HF-propagation conditions based on NOAA data.

Single Taxonomy Selector vs RigReference HF-Propagation conditions