Sawnoff Ahlspiess (3.5e Equipment)
From D&D Wiki
An ordinary ahlspiess, except with a much shorter shaft. 3-4 feet long in total, this weapon can be wielded one handed. It looks a lot like a spear, but with a short blade coming off the end, cross guard included. You can make trip attempts with this weapon, if you fail you can drop the weapon to avoid being tripped yourself.