HTML, Javascript, Bootstrap, Bootstrap Tree View, PHP, PHP-Mailer
Just move this directory into "C:\xampp\htdocs", and go to "http://localhost/<DIRECTORY_NAME>/"
Dont forget to update your email address and password in mail.php
$mail_address = 'MAIL_ADRESS';
$password = 'PASSWORD';
Online Demo: https://online-spare-parts.herokuapp.com/