Brights
_Xenon

Adds bright stuff

Darks
_Xenon

Adds dark stuff

Scraps
Goops

Allows to recycle metal tools

Grimoire
monk

Override tool functionality during runtime

Cave explorer tool
SFENCE

Cave explorer tool to use acoustic signals for undergound exploring.

Ben's Gear
MissingTextureMan101

Attach tool parts to create new tools and add a whole new layer of strategy to your tool crafting!

Obdy
Sires

Adds some pretty OP tools :)

Strong Wooden Pickaxe
mufigilang

Add strong wooden pickaxe that destroy stone as fast as diamond pickaxe

Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests

Portal gun
AiTechEye

Portals and stuff

faction items
GigaByte

add some items to be used as prizes for special events or player achievements

Lakemaker Mod
sunnysideup

A TNT block that makes lakes/bodies of water.

Silver
Jackknife

adds silver ore and tools

Stair Pick
BrandonReese

This is a specialized pick for making stairs.

Too many ores
TeufloV

This adds 53 new ores. But most of them are useless.