#1
Pre-Order - Advance Pre-Order Booking
Pre-Order Prestashop Module enables your customers to pre-order your products in advance or subscribe to the product waiting list. The customers will receive email notification when the pre-ordered product would be back in stock.
#2
Magento 2 Backorder Extension
Our Magento 2 Backorder extension provides the admin with a tool to allows you to display custom stock status for products that are currently on backorder and indicate expected date.
#3
WooCommerce Backorder Manager Pro
The best management plugin for backorders in WooCommerce. View reports with products and orders in backorder, set maximum allowed number of backorders, manage backorder email notifications. You can also export all backorders to a CSV file.