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.

Wisps
ElCeejo

Adds non-entity mobs called Wisps

Mob Limiter
Neuromancer

removes mobs over max count near players with configurable settings

Mobs Redo API
TenPlus1

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

Hud Hider
Hito Hito

Make your hud invisible on mobile.

Nether Mobs
Dirkfried

Add monsters and dragons to your nether world.

Not So Simple Mobs
TenPlus1

Adds a host of creatures into your world with new weapons too.

Mobs Ghost Redo
TenPlus1

Adds ghosts.

Mob Horse
TenPlus1

Adds rideable horse

Skeleton
AntumDeluge

A skeleton mob.

Disable Mob Damage for Advanced Trains
Silver Sandstone

Prevents trains from damaging mobs.

Sky Mobs
TenPlus1

Sky Mobs for Mobs Redo

MFSM Multiple Finite State Machine
Sumi

Allows for multple states to be active, while maintaining typical state machine behavior. Good for gamestate and mobs.

Extreme Randomizer
NO11

Randomises crafting, mob and block drops.

Climbing Pick
lag01

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

Mobkit
mt-mods

Entity API

Zoonami 3D Mobs
isaiah658

Adds 3D monster mobs to Zoonami.

Living Slimes
EmptyStar

Adds living slime mobs to Minetest

Mobs Animal
TenPlus1

Adds farm animals.

Mob Biome Mapper
Neuromancer

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

Creatura
ElCeejo

A performant, semi-modular, Animal focused mob API

Mob Mese Monster Classic
TenPlus1

Adds classic Mese Monster.

Mob Core
mt-mods

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

Slimes Redo
TenPlus1

Add green and lava slimes to your world.

balrog (flux's fork)
fluxionary

adds balrogs.

More Danger
Twinsonian

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

Tortou
LibraSubtilis

Turtle graphics, hyperloop travelingsystem and cubic mobs.

Wilhelmines Marinara Mobs
Liil

adds mobs to the marinara oceans

Mobile Crosshair
GreenXenith

It's a crosshair for mobile.

S Battlehammer
Stakbox

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

The Mob API
TX_Miner

Provides a simple API for mobs

Mobs Skeletons
TenPlus1

Adds three skeletons to the world.

Alive AI
AiTechEye

Advanced survivor ai mobs (npc, monsters and more)

Balrog Sword MT 5.4
DragonWrangler

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

Large Slugs
jwmhjwmh

Adds node-based slug mobs to your world

Mesebox
johalun

Mobile storage box powered by Mese

Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests

Wilhelmines Living Caves Mobs
Liil

adds mobs to the caves of your world