As Talking Code mentioned there are a LOT of them. Here's a pretty good list of 15 Asgardian weapons with good references to the issues they first showed up in, a summary of the story of their first appearance and their powers/effects in the Marvel universe.
Besides Mjolnir Thor had also wielded another enchanted Uru metal weapon, Jarnbjorn. This axe was also created by the same dwarves that crafted Mjolnir.
It didn't have any powers over the weather like Mjonlnir, but it was also indestructible, enchanted to be so sharp it could cut through virtually anything, including Celestial Armor after it was "blessed" with Thor's blood[Thor God of Thunder #18].
Also it could defend against attacks, even beams of energy