Opiner Me
The Opiner Me plugin was written in PHP for the WordPress content management system. It allows you to add a feedback form with star ratings, a list of ratings and reviews, and their average value to your blog. You decide where to place them using shortcodes anywhere in your post.
EEQ EmailSender
The EEQ EmailSender script uses the EEQ Framework and is written in PHP and uses a MySQL database. It allows you to use the newsletter on your website or create your own mailing lists and send emails. It has the option to export and import email addresses to and from a file.
Why did I create a lightweight PHP framework instead of using Laravel/Symfony?
Why is Opiner Me better than heavy opinion systems?
EEQ Framework
This script is a lightweight application framework written in PHP. Thanks to the PDO class, it supports multiple databases simultaneously. The most popular of these is MySQL. EEQ Framework also uses Composer, allowing you to use any libraries or even write your own. It also supports the use of Docker.