ncBindings is a lightweight binding addon, and nothing more than that. It creates a frame in which you can drag your spells, and then bind them. Very simple usage, binding is really a breeze with this addon. Inspired by BindPad, but then light-weight. This addon can bind spells, items and macros to keys, to mousebuttons and to the scrollwheel.
Install and go! Use /ncb or /ncbindings to bring up the bindings frame. Drag your spells into the slots and click on them to bind them. Right-click clears all bindings for the specific spell.