Our ordering platform has basic photo editing (i.e. cropping, change to black & white) in the design portion of the software – you use this when you order any poster, canvas or SIMPL photo book product.
We also recommend a great web-based photo editor with tons of capability Pixlr. It is browser based (nothing to install on your computer) and also has apps for iOS and android smartphones/tablets. You would edit the photos first on your computer, save your edits and then upload and order. Check it out at http://pixlr.com/