This small plugin lets you use hammers as throwing weapons in Fallout 3.

What it does is it adds a script to hammers, so whenever you pick one up in sneak mode, either from the game world or a container, it turns into a throwing weapon in your inventory. It includes a throwing animation. Thrown hammers can be picked up and thrown again. To maximise compatibility, this plugin does not change any cells in the game world and it does not modify any leveled lists.