ImageMagick
Open Source
ImageMagick is a free and open-source software suite for displaying, converting, and editing raster image and vector image files.
FileOptimizer
Open Source
FileOptimizer is an advanced file optimizer featuring a lossless (no quality loss) file size reduction.
GraphicsMagick
Open Source
GraphicsMagick is a utility of image processing.
Phatch
Open Source
Phatch (PHoto & bATCH) is a raster graphics editor used to batch process digital graphics and photographs. Phatch can be used on the desktop as a GUI program …
OptiPNG
Open Source
OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information.
Compare ImageOptim with alternatives
Compare ImageMagick and ImageOptim and decide which is most suitable for you.
Compare FileOptimizer and ImageOptim and decide which is most suitable for you.
Compare GraphicsMagick and ImageOptim and decide which is most suitable for you.