If you do not want to convert your photos to paintings or sketches, how about converting photos to models? TiltShiftMaker is an interesting free software that does just that. It basically tilt shifts your photos to make some parts of photos look like miniature models. To convert your pictures to models, just select the area of the photo that you want to focus on, and TiltShiftMaker will immediately convert that area to miniature model. TiltShiftMaker is also a completely online tool, and you do not need to download anything to use it.