The goal of the tooltip is to show information on things when you hover over them and they are perpetual. Tooltips are common for providing hints on how to use different parts of a web app. It is easy to add and it helps users understand the app more. They’re also useful for display long text that would be too long. There are many Javascript plugins for doing tooltips, but sometimes, the simplest solution is the best. So here in post I’ve collected some of great tooltip examples for inspiration to implement great looking tooltips purely in CSS.
Excellent selection, bookmarked.
I especially liked the Quick CSS3 Tooltips.