Eugene on "Escape to Chimp Eden" uses Multitool.

[Hammer]

I can't tell exactly what tool it is that Eugene is using, but it does look like a leatherman.  I have seen him use it in several episodes, most recently this morning when he is in Sudan making preperations to rescue 5 Chimps.  He is using the plier tool to unravel a knot that was securing one of the Chimps.