Grimoire
monk

Override tool functionality during runtime

Metatool
SX

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

Banshee
ElCeejo

Adds Banshees, a ghostly mob that haunts pine forests

Tool Watcher
j0j0n4th4n

Introduces an item for monitoring the wield tool durability and alerting players when their equipment is close to breaking through a HUD text.

Portal gun
AiTechEye

Portals and stuff

Balrog Sword MT 5.4
DragonWrangler

allows those using the old mobs balrog mod to have balrog swords

faction items
Giga_M

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

Throwable Bombs
DragonWrangler

adds a cave expansion tool, a throwable tnt stick, a throwable smoke bomb, and a mob throws tnt

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.