In #72 Slimming Down Your App, I mentioned ImageOptim for optimizing the size of your images. There is also ImageAlpha which applies lossy compression to PNG files by the same author. You can even run ImageOptim after ImageAlpha for better size reductions. This writeup by the author gives an anecdote of 44% reduction in size by using ImageAlpha before ImageOptim compared to only ImageOptim.

Your feedback is valuable: Do you want more nuggets like this?   Yes   or   No