» Mod/Plugin Name : I have seen it on video's where players copy signs by pressing ctrl + middle mouse button and when they place them it says the exact text from the sign they copied, but when i tried to check internet for any mods/plugins, i couldn't find any. » Download Link : N/A » Why should it be added? : It would be very useful for people (like me) who have to place a few of the same signs texts.
That's already in Minecraft. It's a part of NBT tags, however I believe those are disabled by default on Spigot/Bukkit. + With your donator rank, you can just do //copy and //paste: it'll copy everything on the sign.