jToast is a very simple to use jQuery Plugin to create Toasts.
Best jQuery Notification Plugins & Tutorials with Demo
MessiJS : A simple, elegant message plugin for jQuery
MessiJS is a plugin for jQuery that shows messages in a clean, elegant and simple way. With MessiJS, you no longer need to use the ugly default Javascript alert notification. MessiJS also provides a nice, flexible way to get feedback from your users without blocking Javascript execution.Display text, html content, images and ajax requests with 5KB code.
Push.js : Cross-browser JavaScript Push Notifications
Push is the fastest way to get up and running with Javascript desktop notifications. A fairly new addition to the official specification, the Notification API allows modern browsers such as Chrome, Safari, Firefox, and IE 9+ to push notifications to a user’s desktop. Push acts as a cross-browser solution to this API, falling back to use older implementations if the user’s browser does not support the new API.