Optimizing your PNGs

If you deal with a lot of PNGs in your iPhone apps or websites, look into these tools as they will help you save valuable space and potentially speed up your applications:

pngout

http://www.jonof.id.au/kenutils

pngcrush

http://pmt.sourceforge.net/pngcrush/

In general, I have found pngout to reduce more file size than pngcrush.