There doesn't seem to be a Mac or Linux port for PNGOut; the link redirects to a forum about GTA. And isn't PunyPNG a web front-end for OptiPNG? That would expl

There doesn't seem to be a Mac or Linux port for PNGOut; the link redirects to a forum about GTA. And isn't PunyPNG a web front-end for OptiPNG? That would explain the lack of any real differences between the two. Also, would be good to know what flags were used when compressing the images. // edit: See @ccollins post for a link to Mac/Linux/BSD ports of PNGOut.