The trendiness of polaroid pictures will never cease, but that doesn't mean they're not cool. EasyShot allows you to take your existing pictures and make them into polaroids directly on your iPhone. There's a fair deal of customization along with this app so you can make these modified pictures look more unique.
EasyShot is, well, easy to use. Just load up an image and resize it to exactly how you would like it to fit in the polaroid frame. After that, you can set it in place and start customizing the rest of the image. You can change the color of the background the polaroid is placed on, with color choices including Earthy Brown and Tequila. You can also add a caption right under the picture.
Another cool feature is that you can draw in one of nine different colors anywhere on the screen. If you decide you want to clear the drawing, just shake your iPhone or press the clear button. After you've had your fun, all you need to do is press the save button and you're polaroid picture is now ready to go.
The one thing that is kind of annoying about this app is that the pictures it saves seem to have a white space about 1/6th the size of the total output image. This can be edited away on a computer just by cropping it, but if you were going to do that you might as well just use a polaroid making program on the computer. While it does cost, it does add some fun to manipulating your photos if that's your thing to do.