Intercom.io customer communication platform with a suite of integrated products for every team – including sales, marketing, product, and support.

Klarna Checkout is a complete online checkout solution designed to increase sales and customer loyalty, including Pay now, Pay later, and Financing options.

Demo : https://graceofsweden.se/module/klarnaofficial/checkoutklarnakco
in addon very high price see here : https://addons.prestashop.com/en/express-checkout-process/90132-klarna-checkout.html

Lazy Loading will increase website speed by loading all the images after your website load completely on customer's end.
Show Animated GIF Image during the loading of your website with each product. You can set time interval to delay in loading images

Page load times can be significantly improved by asking visitors to save and reuse the files included in your website

MailChimp Sync for Prestashop customers and Newsleter subscribers . Automatically subscribe customers to your MailChimp list.

Minify HTML CSS JS is a very small and efficient extension. It will minify HTML including inline CSS and JS code.

Display New Products in Home page Product page bottom and every page left right column with responsive and slider. Best module to Show New product's

All checkout steps appear together on a single page for customers to modify any step at once.Responsive and flexible checkout page designSupport All Payment Methods

Background Changer - Ultimate is a simple way to change separate background color or image for each page. the ultimate solution to spread full page ambiances very quickly, advertising skins or create background slideshows.

Prestashop Clean URL's - remove ID's language prefix from URL. PrestaShop Seo URL Module SEO friendly your website and removing auto generated IDs/numbers from URLs of your products, categories, manufacturer & other pages. auto redirects old URLs to new URLs

Newsletter Popup is a powerful and flexible module create lightbox popups that help you get more newsletter subscribers, promote new products, deliver special offers. 

Promotion Popup module displays an advertisement pop-up containing image and text on the website. If the user didn’t close the Ad manually then Ad will automatically close after a time interval set by you