You can do the following with absolutely no restrictions: -Download and install this mod -Upload YouTube videos of gameplay with this mod -Make texturepacks for this mod -Make mods that include features for this mod You can do the following if you mention the author's name somewhere: -Decompile, view, and/or edit the source code of this mod -Use this mod's source code to help with your own mod -Create updated versions of this mod for newer versions of Minecraft -Include this mod in modpacks