As I was writing the metal hand-axe thread I thought of this. Much more unlikely but still useful. A one handed pick useful ONLY for speeding up rock chipping. i have used one of these babies in real life. Simple, convinient and lightweight. Possibly made from a piece of wrought and a stick, or 2 pieces of wrought. Would be far more convinient for roadbuilding through a forest, a tool in each hand. Also I can imagine useful for someone equipped with a sling who suddenly finds themselves under attack. other than that, very little use.
Again, any thoughts or suggestions?