rpm -i http://pkgs.repoforge.org/pngcrush/pngcrush-1.7.66-1.el6.rf.x86_64.rpm
for more updated links
http://pkgs.repoforge.org/pngcrush/
rpm -i http://pkgs.repoforge.org/pngcrush/pngcrush-1.7.66-1.el6.rf.x86_64.rpm
for more updated links
http://pkgs.repoforge.org/pngcrush/