Folks
SonoMichele

Adds customizable NPCs

Stalker
DuckGo

A terrifying and very strong monster that lives in caves

Sunset Biomes
RisingLeaf

Adding two biomes and stuff around them.

Manny
ElCeejo

Adds Manny from that one Reddit post.

Simple Dialogs
Kilarin

Simple Dialogs allows you to add dialogs for npcs and other entities, controlled by an in game text file.

Mobs Skeletons
TenPlus1

Adds three skeletons to the world.

Working villages
theFox

A mod adding villager NPCs that are doing predefined work.

Ocean
StarNinjas

Adds coral reefs, fish, decorative ocean blocks and much more!

Wilhelmines Marinara Mobs
Liil

adds mobs to the marinara oceans

Traders
Sokomine

Configurable mobs/NPC which can trade for you.

Wilhelmines Living Floatlands
Liil

Adds various prehistoric animals to your Floatland Zone, if you are using V7 Map Generator.

Zoonami 3D Mobs
isaiah658

Adds 3D monster mobs to Zoonami.

Nssb
TenPlus1

BIOME integration for nssm, the not so simple buildings.

NodeCore Cats
Warr1024

Add adorable cats to NodeCore

Alien Material
debiankaios

Adds new blocks, items, and tools from aliens. A new time begins.

Nssm Extra
TenPlus1

Even more creatures to add into your worlds

SpawnCraft
ThePython10110

Adds crafting recipes for spawners and spawn eggs to MineClone

In the Fog
Jo5629_

Herobrine has entered your world.

Birds
shaft

Adds birds which drop raw chicken upon death

Large Slugs
jwmhjwmh

Adds node-based slug mobs to your world

Christmas Decor
GreenXenith

Christmas-themed decor

Skeleton
AntumDeluge

A skeleton mob.

Mob Crab (Beta)
Can202

Adds Crabs.

pilzmod
Phii

a spreading mushroom biome which you can spawn into the world, with its own monsters and a boss you need to slay to stop the biome's growth. Best played with bow & armor mod and after reading manual.

Hardcore Farming
Neuromancer

Makes farming a hardcore challenge by adding very hungry pests. Can you overcome them or will they defeat you?

Power Rangers Modpack
LC Creations

Adds power rangers and an API to create your own.

Guinea pig
DrPlamsa

Adds guinea pigs.

NodeCore Snakes
Kimapr

Sneaky snakes in NodeCore!

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Sky Mobs
TenPlus1

Sky Mobs for Mobs Redo

Nether Mobs
Dirkfried

Add monsters and dragons to your nether world.

Mobs Ghost Redo
TenPlus1

Adds ghosts.

Dragon Uisge (waterdragon)
Homiak

Adds powerful Water Dragons, powerful armor and some blocks.

Mobkit Sapien
nurd3

Adds villager like mobs using Mobkit.

NPC you can talk to (in combination with yl_speak_up)
Sokomine

Adds actual NPCs to yl_speak_up

NodeCore SeaLife
Winter94

Adds Biodiversity to NodeCore Seas & Rivers

XConnected
Sokomine

connected nodes like xpanes, xfences, walls

Mobs Takodachi
Silver Sandstone

Adds takodachis.

Mob BiomeDb Mapper
Neuromancer

Allows mobs to spawn in biomes that don't support them (Using info from BiomeDb)

BingFeng Maidroid
XYChen

An improved version of Maidroid, providing maid robots.