Some types of recommended equipment are below.
Click the picture or the link to purchase online.
Use the spike end to unjam your ropes or to poke at your partner in sexy fashion
One of my favorites for separating my ropes for complicated up lines and suspension work. Use with Carabiner's
Great for separating up lines for complicated suspensions
Use the seatbelt cutter (not the knife). Works on up to 1/2" rope and also small enough it that fingers and toes don't end up inside of it.
Weight rated, light weight and fits over most any tree limb or ceiling truss. You'll start seeing hard points everywhere.