Wanted to know where this jQuery is from/available

Wanted to know where this jQuery is from/available

Hi there,
 
I'm still new to jQuery, but so far I am loving it.
 
I've noticed on a few websites, a number of little jQuery functions which look really nice, and I wanted to use them on some sites. (or pay for them, if they do cost). There are two or three particular ones that I have seen so far that I like, and can be found on this website:
 
 
1) The sliding image that changes right to left. (with the 3 little tabs).
2) The "Best Sellers" box.
3) "New Arrivals" box.
 
Does anyone know where I can find out where this was used or implemented from? I've tried looking at the source, but I can't seem to find anything identifiable.
 
In addition to this, I really like the way they have designed the menu - and I have seen this used on some other websites, but I can't seem to find where this came from either.
 
Would appreciate any help,
 
Thanks
-Brad