Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests

More Pickaxes
Koda_

Adds additional pickaxes to the game

Obsidian Swords
Dragonop

Adds the Obsidian Dagger, Sword, and Longsword. Also Obsidian tools, for completeness.

Projectiles
Noodlemire

Adds various projectile weapons which work based off of MT 5.3.0's new collision info provided to objects' on_step functions.

Spears
Echoes91

Adds spears, versatile weapons that can be thrown.

Death Compass
FaceDeer

A compass that points to the last place you died

Voxel Dungeon
Noodlemire

This is a recreation and adaptation of an Android rogue-like game, Pixel Dungeon by Watabou.

Axis Tools
PolySaken

All the functionality of tinkers construct, but all in your inventory.

Ocular Networks
PolySaken

Draw power from the world, and use it to power machines and tools.

Hook (survival tools)
AiTechEye

Survive & climbing tools