An SMTP plugin allows you to configure proper email delivery of your website forms receipts etc.
You can display pdf files as an animated flipbook with page turning sound effects :o
A native WordPress booking system with a lot of options and some griefs.
Simple plugin that checks for and warns about broken links when you save a post.
For longer posts, an automated table of contents can be useful for linking to paragraphs of interest.
With more than 3 million installs WPForms is arguably one of the most popular form plugins ever.
Matomo Analytics can be paired with the WP-Matomo WordPress plugin for easy configuration.
Add CSS and JS snippets to your site, and activate them on demand with this syntax highlighting editor.