PNGPress is a frontend for OptiPNG. It takes one or more image files and squeezes every last kb out of them, without "losing" any data. Just drag your images onto the PNGPress icon, and away it goes. PNGPress will also backup your original images, and allows you to set the compression level yourself.
LicenseFree
File Size401.24 kB
Version1.1.3
Operating System Mac OS X 10.5 Intel Macintosh Mac OS X 10.6