Admin Shield is a free to use Magento 2 extension which helps Magento site owner to restrict the access of Magento admin dashboard based on specific IP. This extension helps in preventing unauthorized access and adds an extra layer of security against hacking
Spam Buster is a free and lightweight extension for Magento 2 which helps Magento 2 ecommerce store owners to clean spam accounts with email and domain patterns with just a few clicks. They can also set cron to run it automatically in the background
Mail Cart is a cool little extension for Magento 2 that adds a feature for users to share their cart via email. This extension adds a widget on the "view cart" page on an ecommerce site based on M2 using with a user can send the cart to one or more email id
