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OliveCraft by Joserichi

OliveCraft adds olive stuff like olive oil or edible olives to Minecraft.

Olympia by DasUmlaut

Olympia Project Core

Olympus Quest by Dorian2712

A fabulous quest to the Mount Olympus to get divine artifacts !

Olympus gear by amazing_zombie

The gear of the gods

Omega Additions by George Kazanjian

Provides additional content for Omega Minecraft Zoo Server

Omega Byte Blocks

Alpha Project

Omega Craft by Cobbs

Tech side of TSON

OmegaInfusion

A follow-up mod to OmegaCraft

Omni Mod by jacks

Omni Ocular by Epix

Omni Ocular

Omni Wrench by MrBretze

This OmniWrench !

Omni's Aged Aether Blocks by Lane, MCreator

Adds cracked, mossy and mossy+cracked variants of Aether Legacy's dungeon blocks

Omni-Goggles by Selim_042

Adds a singular pair of goggles, with the HUD effects of different mod's helmets.

OmniKings by Hedaox

An add-on mod for DBC.

OmniTools by KingLemmingCoFH, Cynycal

OmniTools mod! OmniWrench and Forge Lexicon; compress your toolkit and your ore stash!

Omniconfig by Aizistral, juanmuscaria, CrucibleMC Team

The version independent configuration API.

Omnifluids by EphysPotato

Makes every fluid placeable.

Omnis Core

Common and core code for all Jezza's mods.

Omniscience Debugger by Laike_Endaril

An attempt at a be-all, end-all MC/Forge/Mod debugger...someday...maybe

Omniwand by Invadermonky

The wand to end all wands.

On Further Tales: Explore Further by martinbv95, MCreator

Take Your Adventure Further

On-Hit Particles by Aycy

Particles when attacking entities.

OnFurtherTales

Take your adventure further!

OnImpact by SakerTooth

Explosion on Impact. Simple, yet difficult. Why am I in your mods folder again?

OnTime by Cableguy20, STG_Allen

Playtime tracker

OnUPsMetals

adds new metals and tools

OnceLoModlar by vboxuser, MCreator

One Block Nether Portal

My submission for modjam4.

One Block Random by Tfarecmin

One block skyblock and randomizer

One Chunk Companion Mod by mttprvst13

This is the mod that adds the one chunk generator, and blocks.

One Punch Mod by Dragma2005, MCreator

It's a mod for One Punch Man

One Way Glass by mrnate72, MCreator

One Way Glass

OneBlockMan

ONE PUNCH!!!!!

OneBlockMod by Naturaspell

A mod about OneBlock

OneConfig by Polyfrost

OneConfig

OneCore by W-OVERFLOW

OneCore

OnePieceWeaponsMod

Adds weapons from One Piece

OnePieceWorld

One Piece mod

OnePunchMan

Mod based off of the One Punch Man anime.

OneUPsMetals

lots of ores

OneUpsMiningMod

This is an example mod

Oneshot control by SomeAddons

A mod which allows you to configure max % hp you and entities can loose from attacks, thus a certain amount of attacks is required to kill.

Onion Mod by PingschelleMC

The Onion Mod (1.0.1a) adds onions, golden onions, onion seeds and the onion crop to your game!

Onkor by Hermann, MCreator

Upgraded with recipes

Online Chat by Baseball45

A chat server and client that allows you to talk to friends regardless of whether or not you're in the same server as them.

Online Checker by Aycy

Check if a player is currently online.

OnlineCard Mod by Is_GK

OnlineCard Mod

OnlineCoin

Copyright 2014 - 2018 Volting

OnlineCoins

Copyright 2014 - Volting

OnlineCoinsToMoney

Copyright 2014 - 2017 Volting

OnlineLever Mod by Muka2533

Add a lever that can be operated on the Internet.

OnlineObject

This is an example mod

Only Microblocks by PplusS

This mod replaces the vanilla block drop with chisels and bits parts

OnlySilver by Zot

OnlySilver ports the silver ore and its derivatives from SimpleOres 1.5.2_1 to the later versions of Minecraft.

OnsenMOD

This MOD is beta

Onslaught by codetaylor

An onslaught of mobs!

OnyxBlocks by OnyxAgata, MCreator

Enter short description here

OnyxMod

This adds Onyx armor, tools rtc.

OofMod by Deftu

Plays a sound when something happens.

OogaBooga by jon, codetaylor

A variety of things Ooga Booga related.

Oops by darkevilmac

A solution for accidental placements.

Op Ore Mod by jacky, MCreator

Op Pickaxes Mod by Sonic, MCreator

OpBudder

This is an example mod

OpFuel

A FUEL MOD INFINITE

OpMe by andrenoel

A command to toggle operator status and creative game mode for players you preauthorize in a config file. I like to play as a normal player but be easily opped when needed. For security, nothing can add anyone to the list from in-game.

OpPickaxe Mod by tttymo16

A mod that ads a op pickaxe

OpWeapons

Good Luck...

Opalsplus

Adds Opals, Marble and Lots of blocks and Items to the Game.

Open Auth Mod by RK_01, Lenni0451

Authenticate with proxies during login or play state to allow online mode server switching.

Open Command Block by Zabqer

Command block with output

Open Glider by gr8pefish

Hang glider!