Ajax Search Lite
Search post, pages and custom post types, using this highly configurable live search plugin.
Frontend plugins
Frontend plugins help you create content like forms and tables, or adds to the user experience like providing a search field. Besides being checked for compatibility with the latest WordPress and PHP versions, they are also checked for HTML validity and cookies.
WP Fluent Forms
A form builder with a decent set of features in the free version, a modern interface, and an option to grow.
Content Aware Sidebar
Create individual sidebars or widget areas for different types of content, making aside content more relevant.
WebP Express
A highly configurable, robust and flexible tool, that allows you to convert to WebP images locally.
WP External Links
Add 'nofollow' or 'sponsored' to external links automatically to avoid being penalized by search engines.
Easy FancyBox
Show images, galleries and videos in a lightbox with minimum effort and possible improved privacy.
Formidable Forms
Another form builder with good Gutenberg support, build in style editor and focus on performance.
Related Posts by Taxonomy
With Related Posts by Taxonomy, you can add related posts to a sidebar, widget area or footer, using shortcodes and hooks.