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

Mob Core
mt-mods

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

Not So Simple Mobs
TenPlus1

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

Extreme Randomizer
NO11

Randomises crafting, mob and block drops.

Mobs Redo API
TenPlus1

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

Mobs NPC
TenPlus1

Adds simple NPC and Trader.

Mobs Takodachi
Silver Sandstone

Adds takodachis.

The Mob API
TX_Miner

Provides a simple API for mobs

3D Armor Mobile
LandarVargan

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

Mobs Effects
SFENCE

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

MFSM Multiple Finite State Machine
Sumi

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

Mobs Animal
TenPlus1

Adds farm animals.

Wilhelmines Marinara Mobs
Liil

adds mobs to the marinara oceans

Mob Biome Mapper
Neuromancer

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

Zoonami 3D Mobs
isaiah658

Adds 3D monster mobs to Zoonami.

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Raids
DragonWrangler

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

Balrog Sword MT 5.4
DragonWrangler

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

Climbing Pick
lag01

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

Alive AI
AiTechEye

Advanced survivor ai mobs (npc, monsters and more)

Large Slugs
jwmhjwmh

Adds node-based slug mobs to your world

mime (flux's fork)
fluxionary

adds a monster mimicking its surrounding nodes.

Better Randomizer
ThePython10110

Randomizes node drops, mob drops, and crafting recipes

Mob Limiter
Neuromancer

removes mobs over max count near players with configurable settings

Mobs Skeletons
TenPlus1

Adds three skeletons to the world.

Mob Horse
TenPlus1

Adds rideable horse

Wisps
ElCeejo

Adds non-entity mobs called Wisps

Nether Mobs
Dirkfried

Add monsters and dragons to your nether world.

Slimes Redo
TenPlus1

Add green and lava slimes to your world.

Water Mobs
TenPlus1

Water Mobs for Mobs Redo

Creatura
ElCeejo

A performant, semi-modular, Animal focused mob API

Minec##ft Items and Mobs for Mineclonia
michi16bit

Add minecraft mobs and items

More Danger
Twinsonian

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

Mobs Monster
TenPlus1

Adds many types of monster.

Lategame Amulets
Comet

A cohesive progression system that builds on Mobs Monster

Spawners
SaKeL

Adds spawners for mobs, dungeons, temples and ores.

Tortou
LibraSubtilis

Turtle graphics, hyperloop travelingsystem and cubic mobs.

Healing Stick
Vasiliy

heals mobs and players