If you have an Apple iPhone, iPod, or iPad, you probably already use it for music, reading, games, and video. But these handhelds are awesome tools for photography, as well. Here are best things to do with that iTunes gift card.

isn't a photo app per se--but it's a great way for photographers to leverage an iPad while working with photos on the PC. Here's the deal: If you don't own a second monitor, you can use your iPad as a wireless display. That's great for photo editing programs, in which every inch of screen estate is precious. Yes, it costs $10--but that's a lot less than another monitor.

gives you a creative boost for 99 cents. This fun little app converts any photo into a black-and-white sketch, and then gives you a slew of tools to colorize and otherwise enhance your image into an Impressionist masterpiece.

(iPad only) starts with the same premise--turning your photos into Impressionist paintings--but does so within a slideshow. Select a stack of photos, choose a style, and go. You can also turn opn a soundtrack from your iPad's music collection. It's a cool way to use your tablet as a photo frame to display your photos in a unique way--and it's only 99 cents.