Melee

Melee items and skills have effects that (almost exclusively) attack another player on the same space as the user.

Blunt

 * Hammer
 * Holy Hammer (item)
 * Hammerhead Shark
 * Drunkard's Bar
 * Torch
 * Fish
 * Banana Fish
 * Jackhammer

Sharp

 * Sword
 * Demon Sword
 * Swordfish
 * Wooden Stake
 * Sanctified Stake
 * Serrated Shiv
 * Ethereal Dagger
 * Chainsaw
 * Slash
 * Axe (Let Me Axe You Something!'s penalty)

Other

 * Non-Amethyst Lightsaber

Melee-Triggered Effects
The below effects activate when a melee effect would occur. They are listed in the order they trigger in, from top to bottom.

Melee Protection

 * Any Shield's Passive Effect
 * Shield Mastery (vs. Holy Hammer)
 * Hallucination
 * Kansei Dorifto (place in order needs verification)
 * Pamela's Sweater's Passive Effect

Melee Effect

 * The melee effect itself triggers here.

Success-Triggered
(Order within this category is unverified)
 * Brawler's Brew
 * Bracers Of Bladesinging/Charged Bracers Of Bladesinging
 * Fizzgig

Unconditional-Triggered

 * Algid Revenge/Jeweled Protection/Malevolent Maw/Spiked Protection