This mod add hammers. Hammers basically break a 3x3 area, you're also able to craft their giant and tiny version wich respectively break a 5x5 and 2x2 area.
Enchants:
Digging:
Allow pickaxes to break a 3x3 area!
Excavator:
Allow pickaxes to break a 5x5 area!
VeinMiner:
Allow each tool to break a group of block. It's fully configurable!!