im looking for a mod that gives you the option to have it on or off. kind of a on/off switch
I think you mean a plugin. There is no mod for it (that I know of). To get plugins follow this link to bukkit.org. MC updated itself so that you may easily turn it on/off. Go to "Multiplayer Settings" in "Options" and press where it says "Chat:Shown". You may easily change it to "Commands Only" and "Off". To change, click it.
Hope this helps!
P.S. Do you know how to install mods/recourse packs? I'm having trouble.
P.P.S. Plugins arer like mods but only for MC servers.