Released as a free app on Apple's iTunes store, Strobox offers a variety of lighting diagrams for amateur and professional photographers.  Using the tools within the app, you can build diagrams for photo shoot as well as share the diagrams with your photography brethren.  The app creates PNG files from your diagrams which you can send via email with the iPhone. 
There is plenty of equipment to be found within the app for setting up the proper scenario.  Types of equipment includes strobes, backdrops, hairlights, diffusion panels, umbrellas and softboxes. The app can be downloaded for free here.