Compupic pro.
http://www.photodex.com
Nice program, able to batch about anything you can think of. Open your gallery of pictures, hold down the CTRL key select all the pictures you want to rotate right click "rotate (direction)" done.
You of course can use it for batch picture optimazations, color correction, watermarking sizing etc. Nice undocument feature,
Say you have a folder with a groups of sets, you could hold down the CTRL key and select all the folders and child folders in the folders window, then goto EDIT>SELECT ALL FILES and all file in all those folders get selected and you can do a batch against all of them at one time. So say if you wanted all you pictures to be color corrected, sized, watermarked etc all at once this a great way of doing it. We just finished redoing 90,000 pictures with it in about 3 days. (Still have to manually select which pictures get rotated and do a seperate batch)
Good program and has been a huge time saver.