There was an Apple-customized version of pngcrush in every version of Xcode before 4.3. I can\'t find it in Xcode 4.3. Is it still available as a standalone e
pngcrush
e
The best way to find it is to use the xcrun tool.
xcrun -sdk iphoneos5.0 -find pngcrush will print the path on stdout while xcrun -sdk iphoneos5.0 pngcrush will actually execute the command for you.
xcrun -sdk iphoneos5.0 -find pngcrush
xcrun -sdk iphoneos5.0 pngcrush
See man xcrun for more info.
man xcrun