* [humane.js](https://github.com/wavded/humane-js) - A simple, modern, browser notification system.
* [jGrowl](stanlemon.net/pages/jgrowl) - jGrowl is a jQuery plugin that raises unobtrusive messages within the browser, similar to the way that OS X's Growl Framework works.
* [jNotify](http://www.givainc.com/labs/jnotify_jquery_plugin.htm) - The jQuery jNotify plug-in is an unobtrusive notification system for web-based applications. Use jNotify to inform users when specific actions have completed on your site–such as when an AJAX operation complete.
* [smoke.js](http://ssssnakes.com/smoke/) - A framework-agnostic styled alert system for javascript.
* [jquery-notify](https://github.com/ehynds/jquery-notify) - A growl/ubuntu-like notification system written on top of the jQuery-UI widget factory
* [noty](http://needim.github.com/noty/) - a jQuery plugin to create notifications as an alternative the standard alert dialog
* [alertify.js](http://fabien-d.github.com/alertify.js/) - An unobtrusive customizable JavaScript notification system
* [sticky](http://thrivingkings.com/sticky) - Very small and lightweight notification system, however seems to be unmaintained and abandoned now