More posibilities how to kill mobs/players
SFENCE

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

Traders
Sokomine

Configurable mobs/NPC which can trade for you.

Visual Harm 1Ndicators
Mantar

HP bars for mobs/players

Mobs Animal
TenPlus1

Adds farm animals.

Zoonami 3D Mobs
isaiah658

Adds 3D monster mobs to Zoonami.

Mob Horse
TenPlus1

Adds rideable horse

Better Randomizer
ThePython10110

Randomizes node drops, mob drops, and crafting recipes

Climbing Pick
lag01

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

Too Many Aliases
ThePython10110

Adds aliases to every item/node in MineClone to make them match MineCraft so you can stop forgetting that mcl_mobitems:ender_pearl should be mcl_throwing:ender_pearl.

Wilhelmines Marinara Mobs
Liil

adds mobs to the marinara oceans

Sky Mobs
TenPlus1

Sky Mobs for Mobs Redo

Mobs Monster
TenPlus1

Adds many types of monster.

The Mob API
TX_Miner

Provides a simple API for mobs

Living Slimes
EmptyStar

Adds living slime mobs

S Battlehammer
Stakbox

Adds a battlehammer weapon with high knockback for MTG (compatible only with Mobs Redo API).

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 Ghost Redo
TenPlus1

Adds ghosts.

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

Hud Hider
Hito Hito

Make your hud invisible on mobile.

Nether Mobs
Dirkfried

Add monsters and dragons to your nether world.

Mob Crab (Beta)
Can202

Adds Crabs.

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

Invisiblocks
TenPlus1

Add invisible barrier, light and mob wall into game with new tool

Mob Core
mt-mods

A Mob API meant to expand upon mobkit and bring easy to use features for creating new Mobs.

Mobs Redo API
TenPlus1

Simple and feature rich API to quickly add mobs into your world.

balrog (flux's fork)
fluxionary

adds balrogs.

Cube Mobs
Xanthus

Adds various cube mobs with different abilities using mobkit.