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Obsidiansword

This is an example mod

Obsimond

This is an example mod

ObszidianCraft

Obszidian cuccok...

Occult Whispers by vulturefire/Corrupted Smoker

Enhancing Minecraft with Ancient Mythologies.

Ocean Adventures

Ocean world with cozy little islands and lots of adventures!

Oceancraft by thomassu

A minecraft mod made by thomassu, with many fishy, blocks and items.

Oceany Mod by CatDany

Technomagic in Depths of the Oceans

Ocelot5836's Craytunes Mod by Ocelot5836

A mod that adds a basic application that can play every registered sound event.

OcoMod by McJararaca

Press L and feel the oco.

OctocraftDev

completely revamped!

Odds And Ends by SirSmashy

Odds And Ends for Minecraft, mostly centered around IC2, BuildCraft and Railcraft

Odds&Ends by yunori2011

Just a small mod to add some thingajiggers.

Odioita Mod! by TOMOKO_JSV, MCreator

OdogMod by Odog_Plays_MC, MCreator

A mod about dogs, cool!

Ofalen Mod

This MOD adds a new ore Ofalen, to add a new such as tools, swords, armors, balls using it.