Plugin name: AnvilBreaknt
Plugin link: https://dev.bukkit.org/projects/anvilbreaknt
Description: It's a small plugin that just ensures that anvils don't break down when you use them (by replacing them with a new one each time), saving people the worry and hassle of constantly needing to waste half a stack of iron ingots to make a new one.
This is a small plugin that I wrote on a whim because I couldn't find one that was up to date that satisfied this little nit-pick that my friends (and probably many other players) experience. It's been approved by the Bukkit moderators so I hope it could be added here, thanks! 