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OverflowAnimations by W-OVERFLOW

Animations, animations, animations!

OverflowParticles by Polyfrost

Overlay Suppressor by YiraTheForlon

Delete overlay whitout chat.

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.

Overloaded Armor Bar

This mod allows armor values over 20 to be displayed as different colored

Overlord by The_Fireplace

Summon a Skeleton Army to do your bidding.

Overlord Anime Mod by OnlyALittleCreatorOfMod, MCreator

A mod based on Overlord

Overmine by Darkley, MCreator

Overwatch mod

Overpowerd Swords by aheea, MCreator

Overpowered Armor Bar by LocusWay

Allow armor bar to wrap when wearing better than diamond, plus other tweaks

Overpowered Inventory by Lothrazar

Expands your inventory space to 15 rows by 25 columns = 375 total slots. Also adds four special slots to hold ender pearls, ender chest, clock, and compass. A keybinding is added to use the ender pearl from this slot (regardless of what is in your hotbar). You can store experience by filling Bottles o Enchanting by putting empty bottles in a special slot in the far right. The two buttons on the top right deposit your items into nearby chests automatically. Also includes a 3x3 crafting grid instead of 2x2. Some bits of code are forked from the open source repository at https://github.com/Funwayguy/InfiniteInvo (Which is a completely different 1.7 mod not by me).

Overpowered Mending by RakSrinaNa

Changes Mending behaviour to repair what is in your inventory and need it the most. No need to have it equipped anymore.

Overpowered Mining by AheeDude

Adds 10 new tools to make mining better!

Overpowerportal

This is an example mod

Overreacted's Horse Breeding Fix by Overreactedosbol

A simple mod that makes breeding horses more efficient by adding an extra 5 - 10% bonus to each attribute of the newborn horse.