MoarSigns Mod allows you to own new signs that are with material from other mods including wood signs and metal signs. If you want to use the signs with woods types or metal types, install supported mods, or else you can only get the vanilla plank types of signs and the vanilla metals.

Detail and Download here : MoarSigns Mod 1.8.9/1.7.10

See also : Minecraft 1.8 mods