It is called the timber plugin.(just like the timber mod) It is my favorite plugin to date because wood getting is very time consuming sometimes. What it does is it destroys the whole tree in one hit from an ax(only an ax) so you wont have to worry about those super trees anymore. You also wont have to worry about destroying your own house(just don't hit it with an ax)

Plugin Link http://dev.bukkit.org/server-mods/timber/