JoomPush is a promising Web Push Notification tool for Joomla. You will be able to send Web Push Notifications to all the people who subscribe to it. Keep your subscribers abreast by sending them direct updates on their Desktop and Mobile browsers.
Let your visitors remind themselves about what they were looking for on your site in case they leave it in the middle. Turn them into returning visitors or even subscribers by putting a "Remind Me" button on any content on Joomla!