Balkon's Weapon Mod introduces a load of medieval weapons, to make Minecraft combat way more fun!
Like vanilla weapons, Wood, Stone, Iron, Gold or Diamond can be used to make them.
Wooden weapons will cause the least damage, diamond the most, and the usages also scale that way. Gold weapons are kind of special in that they have a lot less usage than Iron or Diamond, but have a bigger knockback.
In addition, most of these weapons can be enchanted in an Enchanting Table.
The official Minecraft Forum thread can be found here.