Originally Posted by ectoplasm
This is actually pretty sweet for automatically cropping text based PDF page margins. This is the first tool I found that does this automatically. If there are others, please comment. I'm not interested in the programs where you have to select a region by hand.
Try the PDF forum thread listing
--the top half dozen threads which are listed with a "sticky" icon next to them all discuss PDF tools for mobile reading--almost all of them do some form of auto-cropping.