More posibilities how to kill mobs/players
SFENCE

Add more posibilities how to kill mobs and/or players, like traps, throwable TNT, etc.

Visual Harm 1Ndicators
Mantar

HP bars for mobs/players

Traders
Sokomine

Configurable mobs/NPC which can trade for you.

Mobkit
mt-mods

Entity API

Slimes Redo
TenPlus1

Add green and lava slimes to your world.

GetName
kevins

Adds an API and tool to generate random names for NPCs, mobs, and places.

Mobs Animal
TenPlus1

Adds farm animals.

Zoonami 3D Mobs
isaiah658

Adds 3D monster mobs to Zoonami.

Mob Horse
TenPlus1

Adds rideable horse

Climbing Pick
lag01

Tool to climb, double jump, and do good damage to mobs.

Wilhelmines Marinara Mobs
Liil

adds mobs to the marinara oceans

Sky Mobs
TenPlus1

Sky Mobs for Mobs Redo

The Mob API
TX_Miner

Provides a simple API for mobs

Living Slimes
EmptyStar

Adds living slime mobs

More Danger
Twinsonian

Scaling difficulty multiple games/mob apis. Based on the difficulty mobs will have faster movement speed, more damage and more health.

3D Armor Mobile
LandarVargan

Adds a command to bring up a formspec that allows mobile users to put on armor

Balrog Sword MT 5.4
DragonWrangler

allows those using the old mobs balrog mod to have balrog swords

Moblib
LMD

Low-level high-performance entity library

Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests

Common Mob Interface
Byakuren

A standard modding interface for interacting with mobs

Mob Biome Mapper
Neuromancer

Allows mobs to spawn in biomes that don't support them.

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Alive AI
AiTechEye

Advanced survivor ai mobs (npc, monsters and more)

MobConf
zeuner

Place, remove and configure Mobs (for now: NPCs) using chatcommands

Mobs Effects
SFENCE

Provides predefined attribute effects without apply logic for mobs based on Mobs Redo API, modifying movement, combat, and behavior attributes

Extreme Randomizer
NO11

Randomises crafting, mob and block drops.

mime (flux's fork)
fluxionary

adds a monster mimicking its surrounding nodes.

Raids
DragonWrangler

Allows server owners or server admin to start mob raids to attack settlements or players

Disable Mob Damage for Advanced Trains
Silver Sandstone

Prevents trains from damaging mobs.

Mobs Ethereal Bosses
PixelZone

Adds Bosses in biomes from the "Ethereal NG" and "Mineclonia" mods

Mobs Takodachi
Silver Sandstone

Adds takodachis.

Hud Hider
Hito Hito

Make your hud invisible on mobile.

Better Randomizer
ThePython10110

Randomizes node drops, mob drops, and crafting recipes

Minec##ft Items and Mobs for Mineclonia
michi16bit

Add minecraft mobs and items

balrog (flux's fork)
fluxionary

adds balrogs.

Mob Crab (Beta)
Can202

Adds Crabs.

Mob Limiter
Neuromancer

removes mobs over max count near players with configurable settings

Cube Mobs
Xanthus

Adds various cube mobs with different abilities using mobkit.

Advanced fight
SFENCE

THIS IS UNSTABLE BETA. Adds hitbox-based combat system with body part damage for mobs and players

Healing Stick
Vasiliy

heals mobs and players