humane.js is a simple, modern, framework-independent, well-tested, unobtrusive, notification system.
Utilizes CSS transitions when available, falls back to JS animation when not. Includes mobile support.
overhang.js is a jQuery plugin to display sleek, instant notifications, confirmations or prompts inside a given element.
Notifier is a jQuery plugin to push notifications on your webpages.
peekABar is a jQuery plugin for a notification bar with a lot of customization options.
Oh Snap! is a simple jQuery/Zepto notification library designed to be used in mobile apps.
Amaran JS is a jQuery plugin to create beautiful and stylish notifications with animations.
jBox is a powerful and flexible jQuery plugin, taking care of all your popup windows, tooltips, notices and more.
MessageBar is a jQuery plugin for top bar notification messages. Dismiss it by clicking the x.
jBar is a simple and lightweight jQuery notification banner which is an alternative to the Hellobar. It allows you to create a simple call to action and bring it forward for the user to see at the top of your website. The user can then toggle the visibility of the bar by clicking the ribbon.