I have just started to play with Topaz Adjust 3.2 which is a plug-in for Photoshop and other photo editing programs. You can do some serious work using Topaz Adjust to reduce noise and manipulate images in other ways. However, the most fun for me is the psychedelic effects available. Here is my smugmug gallery of images manipulated with the psychedelic filter of Topaz Adjust V3.2. It is really amazing the differences in images manipulated with this single filter.
rpcrowe : photos : Topaz Adjust V3.2