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

Throwable Bombs
DragonWrangler

adds a cave expansion tool, a throwable tnt stick, a throwable smoke bomb, and a mob throws tnt

Mobs Redo API
TenPlus1

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

Lategame Amulets
Comet

A cohesive progression system that builds on Mobs Monster

Nether Mobs
Dirkfried

Add monsters and dragons to your nether world.

Balrog Sword MT 5.4
DragonWrangler

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

Alive AI
AiTechEye

Advanced survivor ai mobs (npc, monsters and more)

Mobs NPC
TenPlus1

Adds simple NPC and Trader.

Mobs Monster
TenPlus1

Adds many types of monster.

3D Armor Mobile
LandarVargan

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

Vegan Misc.
AirplaneMan

Adds vegan alternatives for there are no mob drops avialable

Mob Mese Monster Classic
TenPlus1

Adds classic Mese Monster.

Common Mob Interface
Byakuren

A standard modding interface for interacting with mobs

Healing Stick
Vasiliy

heals mobs and players

Mob Biome Mapper
Neuromancer

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

Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests

Mobs Ethereal Bosses
PixelZone

Adds 3 bosses to some biomes..

mime (flux's fork)
fluxionary

adds a monster mimicking its surrounding nodes.

Mobkit
mt-mods

Entity API

MobConf
zeuner

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

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Hud Hider
Hito Hito

Make your hud invisible on mobile.

Living Slimes
EmptyStar

Adds living slime mobs

Mobs Ghost Redo
TenPlus1

Adds ghosts.

Large Slugs
jwmhjwmh

Adds node-based slug mobs to your world

Mob Core
mt-mods

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

Cube Mobs
Xanthus

Adds various cube mobs with different abilities using mobkit.

balrog (flux's fork)
fluxionary

adds balrogs.

X Spawners Mobs
SaKeL

Adds mob spawners.

Creatura
ElCeejo

A performant, semi-modular, Animal focused mob API

S Battlehammer
Stakbox

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

Mob Crab (Beta)
Can202

Adds Crabs.

Mobile Crosshair
GreenXenith

It's a crosshair for mobile.

Better Randomizer
ThePython10110

Randomizes node drops, mob drops, and crafting recipes

Wisps
ElCeejo

Adds non-entity mobs called Wisps

Mob Limiter
Neuromancer

removes mobs over max count near players with configurable settings

Mobs Skeletons
TenPlus1

Adds three skeletons to the world.

MFSM Multiple Finite State Machine
Sumi

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