Sketchy Snaps is a new Android App that allows you to easily manipulate images, with a variety of preset effects. There 25 effects in total, ranging from sketch styles such as pencil, crayons, charcole, etc, but also including some great templates such as 'news' which make the image appear to be incorporated into a news article.
It really will be all about trial and error until you find some effects that suit the particular image you like. Images can be loaded up from your phones gallery, or taken directly from the camera.
Finally, once you have finished manipulating an image, it can be shared through available apps on your device, or saved locally for use at a later point in time. All in all, this is an excellent app, well worth the download. For free (albeit with a watermark), the price is definitely right!
See below for some examples of what you can do with Sketchy Snaps.
In the words of the developers:
Sketch your photos in more than 25 types.
There is also a premium version available for download here.