Backdrop Designer for Photoshop for Mac

From Digital Anarchy:

Backdrop Designer is an entirely new way of creating professional quality backgrounds for portraiture, products shots, corporate presentations, and other commercial work. This Photoshop plugin ships with over 900 premade textures that simulate muslin drapes, the physical backdrop traditionally used in studios. Choose a texture, then cast a shadow of material folds or light simulation. Combine and modify the presets to create 1000s of unique original backdrops, then save your customized backdrops for future projects. Your digital backgrounds are resolution-independent, so they can be rendered at any size to match the detail of a photograph with no loss of quality. With Backdrop Designer, you will simplify your workflow while eliminating the cost of multiple backdrops.