MICHAEL CEO  Thanks to the developers for making this a free upgrade. I purchased ResizeMe 1 last fall and it has saved me a lot of time since.

I put some of the new features -- in particular the drop shadow and reflection effect -- to immediate use and it works great.  
(Version 2.0)

ANONYMOUS  Just wanted to let people know that version 2 is a free upgrade for all those who bought version 1 (that is, your license key for version 1 will work in version 2 as well).  
(Version 2.0)

BRUMM  20 DOLLARS ....OR just FREE as in BEER:

The best resizer I've found for Mac is the FREEWARE 'ThumbsUp',

http://www.macupdate.com/info.php/id/11898/thumbsup

ThumbsUp can not only create thumbnails or icons for images and movies.

ThumbsUp goes far beyond, it's a superfast batch image resizer, a format converter (for example jpg to tiff, etc.) and ThumbsUp can sharpen (!) and antialias (!) the images (not only the thumbs as falsly stated in the manual) and can do all that in one fast step.

...and yes, ThumsUp is FREEware.

But if anybody want to spend 20 dollars for additional flipping and rotating, BatchResize is the right place.

Or, I've recently discovered the big secret that Mac OS X's Preview flips and rotates for free...

I think ResizeMe is far to expensive, (a quarter of a whole operation system, OS X)

therefore I don't give more than one star  
(Version 1.3.1)

GILETLO  ResizeMe is too expensive, try jasper's phototools for exemple, more complete (resize, and frame) and free.  
(Version 1.3.1)

LA SEPIA  Tested. But it does not work fine. Seems to be a joke for 20 bucks.

I recommend other software like Imagewell, Sizerox and Downsize.

They offer much more, work stable and had a better price.  
(Version 1.2)