Recently, a friend asked me if there is any way to easily turn a photograph into a sketch, kind of like they do with journalists' pictures in The Wall Street Journal articles. At the time I told him no, but recently I've found a nice little OS X app that does that very thing.
PicSketch allows anyone to turn a photograph into a sketch in just a few seconds. And while they don't have a WSJ filter like my friend wanted, the app does offer a lot of customization options that allow you to tweak your sketches as you see fit. To use PicSketch, simply drop one of your digital photos into the software. You have two sets of tools to begin your work on converting the pic to a sketch.
The easiest set of tools are the "preset" ones. Here, you simply select a sketch style and paper background and the app does the rest. The "classic" tools give you a bit more control, allowing you to not only select the paper background, but also the pen size and color, the moisture and the brightness and contrast.
PicSketch isn't something you'd need if you're a Photoshop expert, but for those of you who like fun little photo apps, PicSketch is a good deal. The app costs US$4.99 in the Mac App Store.