Torch Bomb
FaceDeer

Place torches throughout your entire surroundings with a torch bomb

Spacecannon
BuckarooBanzai

Adds three scifi/space cannons with various projectile-speed and explosion-strength

Voxel Dungeon
Noodlemire

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

Spears
Echoes91

Adds spears, versatile weapons that can be thrown.

Hammer Of Power
Lone_Wolf

Adds a steel hammer and the powerful version that you can create from it.

Obsidian Swords
Dragonop

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