Metatool
SX

Provides API to register node metadata tools along with few useful tools

New pickaxes
Arkatron

Adds new pickaxes

Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests

Portal gun
AiTechEye

Portals and stuff

Silver
Jackknife

adds silver ore and tools

Lakemaker Mod
sunnysideup

A TNT block that makes lakes/bodies of water.

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.