You can find new weapons inside jars carried by enemies. Armour can be found at hidden spots within the stage, but not inside jars carried by enemies. Keep in mind that you can also find other items inside jars.

Lance	Flies far and straight. Default weapon.
Dagger	Flies like a lance but faster. You can throw up to three in a row.
Torch	Flies in a short arc, then continues to burn upon landing.
Axe	Flies in an arc and slices through weak opponents.

Note: Other weapons can also be found in the game.