Equipment in Black Ops takes up a separate "Equipment" slot unlike in Modern Warfare 2 as there is a separate 'Lethal' and 'Tactical' Grenade slot. It can also be picked up and re-positioned by the person who originally set it down in the first place
Trample Steam: A catapult that flings away any player or zombie that steps on it, resets instantly after a zombie is flung and takes approximately 10 seconds after a player is flung, which leaves it vulnerable. Can be used to fling players across gaps.
Subsurface Resonator: A speaker system that uses sonic waves to kill or disorient zombies.
Head Chopper: A chainsaw-like implement that can attach to walls and floors, swings at players and zombies, will down a player without Juggernog in one hit, kills zombies instantly.
Maxis Drone: A quadrotor drone controlled by an AI Maxis, it can revive players and kill zombies. It is required for the Little Lost Girl Easter Egg.
Equipment remains in Search and Destroy after a player's death. However, only the Claymore and Bouncing Betty will be effective, as all the others require a living player to function.