Tiny JS library taking advantage of bootstrap's popover to help guide your users around. Demo
Bootstrap 2.3.1 + jQuery. There's an issue that it doesn't work with Bootstrap 2.0.4. My development setup is always latest bootstrap (currently 2.3.1, as of 20th March, 2013) so I can't really tell. If you don't want to work with Bootstrap, check out intro.js.
I'm not so much into markdown so please see Documentation on the demo page
For the concerned/curious about stealing idea of intro.js or copyright or anything like that: Bootstro.js was conceived about 2 months before it was released and publicly discussed (by me) 1 day before intro.js's first commit.
A spaghetti working version was also finished few days before that as part of SandPHP (private repo), but Bootstro.js was made opensourced after intro.js's debut in HN Just so you get the picture.
I'm an advocate for opensource, but I hate licences, copyright and all that shit. Seriously, if it's opensource it should be completely free, no lisence or liability or whatsoever attached. I hate to put a license to this tiny utility, it's too small and simple to have one. Bootstrap already does like 99% of the work. But sigh, that's the way it currently is so as advised I add to put MIT license to this "library", basically that's the most "free" license around.