WP Mail SMTP
An SMTP plugin allows you to configure proper email delivery of your website forms receipts etc.
Testing plugins with WordPress 5.8 and PHP 8.0
This site tests popular frontend and backend plugins in a WordPress multisite network, running the latest versions of WordPress and PHP. Content creating plugins are tested for valid HTML output and if the plugin sets cookies or not.
DearFlip 3D Flipbook
You can display pdf files as an animated flipbook with page turning sound effects :o
Bookly – Online Booking
A native WordPress booking system with a lot of options and some griefs.
Save Post. Check Links.
Simple plugin that checks for and warns about broken links when you save a post.
LuckyWP Table of Contents
For longer posts, an automated table of contents can be useful for linking to paragraphs of interest.
WPForms contact form builder
With more than 3 million installs WPForms is arguably one of the most popular form plugins ever.
WP-Matomo (WP-Piwik)
Matomo Analytics can be paired with the WP-Matomo WordPress plugin for easy configuration.
Simple Custom CSS and JS
Add CSS and JS snippets to your site, and activate them on demand with this syntax highlighting editor.