Blender.
Yeah... considering I've personally never seen a double-headed axe in any of my games. And I've played a lot.
I could take out one hundred verts or so, because there's a little too much detail where it won't be seen.
@Caravan: But the original double-headed axe doesn't even use a 6-sided cylinder... I think it's at least 10-12.
The axe-head is being a little wierd, though... I tried a curve and it just exploded... I tried good 'ol by-hand modelling, but that went a little wierd when I tried to make the edges, and I tried cube-modelling, but I ended up with an inside-out axe... sheesh...
I'm going to try a simpler cube-modelling method (model the top using y-axis mirroring, then duplicate and rotate to make the bottom).
EDIT: NOOOOOOOOOOOOO!!!
Blender crashed... just as I finished the model. Damnit.
Sorry, all, I'm going to have to lie down for a while... I've got a bout of 'flu, and I really can't strain myself any more than I already have. I'll try again tomorrow, when I'm (hopefully) feeling a little better.