Toast is a jQuery plugin to show highly customizable notifications to the user.
Notifier is a jQuery plugin to push notifications on your webpages.
herbyCookie is an easy jQuery plugin asking at user for cookie allowing a website to comply with the EU cookie law.
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.
notifyMe is a simple plugin created for fun and learning for fixed notifications in pages. He works when a button is clicked, errors, validations, info and everything you want.