Allowed Client Mods on EC
Remember, If the client provides an unfair advantage over a vanilla client, then the mod is not allowed. If you feel that a mod you are using is not allowed, play it safe and do not use it.
Allowed Mods:
Optifine
Shaders Mod
Texture Packs
Any Mod that is only cosmetic and changes they way the game looks. (Eg. Making trees look different or changing the layout of your HUD)
Unallowed Mods:
This list includes a few mods that are not allowed. They are, but not limited to:
Hack Clients such as Huzuni, Nodus, Wurst, Promethus, (and more)
Xray mods, and Xray Texture Packs
Damage Indicators
Rei’s Minimap or any Minimap mod
Too many items mod
Kill aura
No Fall
Fly Hacks
ps: reprint for the guys who cant access to the google