Mob Limiter
Neuromancer

removes mobs over max count near players with configurable settings

Shadow Realm
archfan7411

The realm of shadows contains many hidden horrors.

Cthulhu eye boss
GigaByte

Cthulhu eye boss adds

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

TurtleMiner
BirgitLachner

A Mod to let Kids start programming with a turtle that can move around in the world, and dig and build what the user wants.

Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests