
Tooltipster
Tooltipster is a lightweight jQuery plugin that enables you to easily create clean, HTML5 validated tooltips.

Hovercard
Lets you to display related information with the hovered label, link, or any html element of your choice.

aSimpleTourPlugin
aSimpleTourPlugin is a jQuery plugin that will help you to make website tours.

- Paid
Tipped
Tipped allows you to easily create beautiful tooltips using your Javascript framework of choice.

BeautyTips
BeautyTips is a jQuery tooltips plugin which uses the canvas drawing element in the HTML5 spec to dynamically draw tooltips (sometimes called “talk bubbles” or “help balloons”) associated with a html element on the page. These tips are highly configurable and can be triggered in many different ways.

Tipsy
Tipsy is a jQuery plugin for creating a Facebook-like tooltips effect based on an anchor tag’s title attribute. Using the gravity parameter, it’s possible to control the positioning of the tooltip relative to the pointee.

Qtip2
Built from the ground up to be user friendly, yet feature rich, qTip provides you with tonnes of features like rounded corners and speech bubble tips