Lifesteal - Gives you half a heart back whenever you punch an enemy.
Blind - Blinds the Enemy.
Deathbringer - Doubles your Damage.
Gooey - Hitting your enemy rapidly causes the enemy to be flinged into the air.
Poison - Poisons your enemy.
Block - Blocking with a Sword increases your Resistance.
Ice Aspect - Slows your enemy on hit. Has a Chance to freeze an enemy Player.
Shockwave - Upon hitting an enemy, you hurl up the ground in front of you.
Autorepair - Automatically repairs your Armor/Weapon after you started it via shift + rightclicking.
Crippling Strike - Cripples your enemy on hit.
Thundering Blow - Upon hitting an enemy, you have a chance to strike Lightning onto it.
Vampire - Heals you by half of your damage.
Deep Wounds - Upon hitting an enemy, you have a chance of causing it to bleed.
Charge - Attacking while sprinting increases your damage.
Aerial - Attacking while airborne increases your damage.
Wither (Thanks to phoenixlzx) - Withers your enemy on hit.
Headless (Thanks to rpgrowland, IAmNotPopular and hetjoshi) - Gives you the head of an enemy you killed.
Disarming - Disarms the enemy.
Tools only
Explosive - When destroying a block that your tool was meant for you cause an explosion that breaks similar blocks arround that.
Smelting - When destroying a block, get the smolten products of this block.
Energizing - Allows you to dig faster for a tiny moment after breaking something.
Quickening - Breaking a block will give you a temporary speed boost.
Bow only
Bombardment - Bombards the Player on hit.
Lightning - Strikes your enemy with a Lightning.
Firework - The arrow constantly spawns fireworks for 5 seconds. May cause lag if spammed ( arround 50 arrows at once ).
Paralyze - Slows, Blinds and Weakens your enemy completely.
Molotov - Attaches a molotov to the arrow, tends to start fires.
Volley (First merged contribution! Thanks to fantasm0) - Fires multiple arrows in a cone in front of you.
Wither (Thanks to phoenixlzx) - Applies the Wither effect to your enemy.
Piercing (Thanks to Hetjoshi) - Ignores your enemy's armor.
Shuffle (Thanks to Darkman_Bree) - Switches your position with your enemy's position.
Bounty Hunter (Thanks to Darkman_Bree) - Gives you bounty when you hit another player.
Healing (Thanks to rpgrowland and hetjoshi) - Heals your target for 1 heart per level.
Blaze (Thanks to PrinceeeMC) - Shoots fireballs instead of arrows.
Armor only
Molten - Sets the enemy that hit you on fire.
Enlighted - Heals you when hit.
Hardened - Applies Weakness to the enemy that hit you.
Poisoned - Poisons the enemy that hit you.
Frozen - Slows the enemy that hit you.
Obsidianshield - Gives you Fireresistance.
Shielded - Gives you a regenerating shield.
Revulsion - Applies Nausea to the enemy that hit you.
Self Destruct - Spawn live TNT on death.
Cursed (Thanks to phoenixlzx) - Applies the Wither effect to your enemy.
Endershift (Thanks to Hetjoshi) - Revitalizes you when severely wounded, giving you a speed boost and some hp to run away with.
Drunk - Gives slowness, mining fatigue and confusion to attackers.
Berserker - When low on health, you gain extreme strength.
Cloaking - When hit, you gain stealth for a few seconds.
Boots only
Gears - Boots. Gives you a Speedboost.
Springs - Boots. Gives you a Jumpboost.
Stomp - Boots. If you land on an enemy and would normally get Falldamage, you give the Falldamage you would take on the enemy, negating the damage for you.
Helmet only
Implants - Automatically replenishes your Food/Airbar when moving.