Well I warn you once you start poking around on this site you could be here a while:
Cool Tools
Click any of the links on the left side of the page that interests you.
You can find stuff like this:
http://www.animatedknots.com/indexclimbing.php Nice reference to give people learning knots
http://www.kk.org/cooltools/archives/003947.php
Nice replacement for the canned air we use in the computer lab
