Built with HTML5, performance and accessibility in mind, WS Form Lite is definitely worth a closer look.
Create individual sidebars or widget areas for different types of content, making aside content more relevant.
Search post, pages and custom post types, using this highly configurable live search plugin.
A collection of 40 blocks for the Gutenberg editor, some which are quite unique.
You can display pdf files as an animated flipbook with page turning sound effects :o
Show images, galleries and videos in a lightbox with minimum effort and possible improved privacy.