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Other Blocks by Vova_master

Mod, that adds new blocks and items.

OtisTheInfiniteGoat by Cyber, MCreator

Make a renewable source of meat, with Otis.

Otter

Otters!

Outfox by Kais

Adds adorable, tameable Foxes to Minecraft's forests. Once befriended, they can sniff out any block in the world and lead you to them.

Over Crafted Mobs Two by SoggyMustache

New Crazy Entities

OverCave by abused_master

A Mod that generates a Extra Utilities like Deep Dark as the overworld!

OverCraft

This is my first mod, Just random stuff so far, Please enjoy!!!

OverMods by OvermindDL1

OverMods parent mod

Overloaded by CJ Miller (cjm721)

Adds various complicated and tedius things that will minimize your need to destroy your server with your chunk sized arrays of machines.

Overlord by The_Fireplace

Summon a Skeleton Army to do your bidding.

Overlord Anime Mod by OnlyALittleCreatorOfMod, MCreator

A mod based on Overlord