Suggested plugins for projection mapping?

Does anyone have any suggestions on plugins for projection mapping and camera projection for turning 2D images into a 3D landscape? I heard that there may be free plugins to do this in FCPX, but I can't find any... If there are paid ones, cheaper is better.

I'd actually suggest using one of the dedicated 3D Mapping applications, several free out there if you look.
I'm not aware of any 3D mapping plugins, not sure you could do that complex geometry mapping with a simple plugin. Maybe someone has one somewhere. But I'd work with one of the several 3D mapping apps out there instead.

Try these Motion tutorials:

That's not really projection mapping. But is using 2D images to create a 3D landscape. The two techniques are not really mutual to each other.

And if those tutorials don't work, you can always try:
store.pixelfilmstudios.com/product/inmotion3d-projection/