The grenade(with a hammer) is for splitting logs into random bits.
The maul pic is a good one. They're not quite as dramatic in the flesh! It's basically a wedge on a handle and you can use a hammer on the back of a maul to drive it through.
An axe will split logs, but is a tree-felling tool that can cut across the grain if necessary, although a bow saw is probably easier for that.
A small hatchet is handy for tidying things up and making kindling. Wacking the back with another bit of wood will split quite big pieces though.
Sharpening an axe is one of those activities that is an antidote to a world of male face cream, male manicures and man-bags.
Of course, nonchalantly embedding the sharp axe in the chopping block when you've finished is another