This free extension lets you apply any one of a series of filters that comes with the extension to your images in Photoshop CS5.
Photoshop CS5: Oil Painting with Pixel Bender. It’s non-destructive and leave the original image unharmed. The best results are achieved by using a photo resolution size between 1.000 – 4.000 pixel.
This free FX Tool will give your photos a realistic painted look without any effort.