There's a great lopsided throwing axe you get in the first quarter of the game, as well as some interesting axes throughout.
There's a couple of really cool maces/morning stars that do elemental damage that come in about halfway through the game.
Hammers? Well, hammers exist, but are not so plentiful.
If you like spoilers, you can find a decent list of weapons at:
http://www.gamebanshee.com/icewindda...nt/hammers.php
Sadly, a lot of cool items in IWD2 are either random drops (no telling if you'll see them or not) or show up in the HOF section...
-Raffin