Hi,
It's "HikaShop PayPal payment plugin".
Note however that the API used by this plugin is deprecated by PayPal. It will still work but PayPal will recommend you to use instead "HikaShop PayPal Checkout payment plugin".
This plugin doesn't redirect the user to PayPal and directly allows for the payment at the end of the checkout on your website but with the same PCI DSS compliance requirements than when being redirected to PayPal for the payment. I would personally also recommend you to use it over the redirect plugin. We've switched to it on our own website and customers are happier with it. Among other things, it allows customers to pay with many different payment methods, more adapted to the local market of the user, and it can also allow them to pay in several installments.