Creating website tour

Question

When you sign up on github.com they show a tour that shows everything to start using github properly. Also google shows these tours in Gmail when they add a new feature. These are tiny little boxes, tool-tips float on the page and sometime some key part of the site gets nicely highlighted by changing the color of either border or background.

My question is, Is there any existing library to achieve this?

Answer 1

Are you looking for something like this: http://amberjack.org/ ?

Answer 2

Answering my own question. I am using Guiders.js. It completely serves my purpose. Specially the tool tip on different elements is what I was looking for.

UPDATE: October 3rd, 2013

Another one I found called intro.js