The reap mod is a mod that allows you to quickly cut down a tree by breaking just one lower block of any kind, after which all the connected wood will break. Also, the mod will speed up farming, now if you right-click on a grown plant, it will be collected and automatically re-planted.
How to install the mod:
Install all additional mods if specified.
Download mod and copy to .minecraft / mods
Launch the forge version of the game in the launcher.