PNGSquash

A free and easy to use drag-and-drop PNG compressor app for OS X

Version: 1.1.1
License: Free
Operating System: Mac OS X
Homepage: github.com
Developed by: Michael Sanders

PNGSquash is an OS X app that combines the top PNG compressors (that is, PNGCrush, AdvPNG, OptiPNG and PNGOut) into a streamlined interface for quick and effective compression.

PNGSquash uses lossless compression (i.e., there is no change in quality), so it is ideal for web developers looking to save bandwidth.

NOTE: PNGSquash is released and licensed under the terms of the zlib/libpng License.