Luminar from Macphun just came out (beta,FREE!), so I DL it and its quite good, for what it is.
This is really beta, in that there is hardly no image manipulation tools like vignetting or blurring, but it does have very very nice preset filters that would take days to recreate with Adobe. It can import almost any format, including Pentax ptx and pef files. Layering is possible, but kind of slow stacking. This is more like to VSCO than any other product, so if you work with VSCO, you will at home with this one..have a try at it..Im getting to like it a lot..
Miss Turtle original, Miss Turtle with Automatic Copper Shade