I know some on this forum would prefer a quality lockblade folder..
A great little frame lock is the Gerber STL 2.0. I bought one at the Sports Authority for $11.95.
It is all metal and you can open it with one hand. It actually feels pretty good in the hand. Doug mentioned it in his SHOT show recap for 2007.
http://www.gerbergear.com/product.php?model=1122These days I am not a big Gerber fan but this little knife is great and it would fit into a DR PSP no problem.
Two other cool items are these Derma Safe razors and saws. County Comm has them for sale if you don't want to buy bulk.
http://www.derma-safe.com/index.htm Bill