Saws, Axes, Hatchets, Big knives or Tomahawks.

 Saw: these are great for butchering. Battoning a knife will work, and axes make a mess of things. You need these for moose, but butchering trees may be different. I havet really used these, for butchering a dead standing for a fire, but outside of this they seem like more work than the alternative. 

Axes: heavy. You need a horse, or atv to use these reguarly in the bush.

Hatchets: a little heavy to carry on a march. The extra heft may help when butching bigger trees and these can also be used for skinning by using the blunt back to tamp the hide off. 

Big Knives: I have found that something that tries to do everything, does nothing well. But, the hudsons bay company made a knife for the boys outdooors which was quite useful.

Tomahawks: these are my go too. Light. Mine is self made from a cercular saw. They can butcher most trees quickly and ultra light. A few good whacks on one side and one good whack on the other, or a chew around can make a big dead standing into fine wood to last a couple hours. Paired with a small, light, 1095 useful knife is all you need for all tasks. Im not sure why guys prefer the folding saw over the tomahawk for bush work.