Redfield has recently released a new, free, Photoshop-compatible plugin that also works in Xara software that has Live Effects. It is called Fine Touch and it 'simplifies' (reduces) the details of photographs, making them look like a painting.

Info link: http://www.redfieldplugins.com/filterFineTouch.htm
Download link: http://www.redfieldplugins.com/Downloads.htm