GraphicsMagick Image Processing System is the swiss army knife of image processing. Here are just a few examples of what GraphicsMagick can do: Convert an image from one format to another (e.g. TIFF to JPEG) Resize, rotate, sharpen, color reduce, or add special effects to an image Create a montage of image thumbnails Create a transparent image suitable for use on the Web Compare two images Turn a group of images into a GIF animation sequence Create a composite image by combining several separate images Draw shapes or text on an image Decorate an image with a border or frame Describe the format and characteristics of an image Note that the QuantumDepth=8 version (Q8) which provides industry standard 24/32 bit pixels consumes half the memory and about 30% less CPU than the QuantumDepth=16 version (Q16) which provides 48/64 bit pixels for high-resolution color. A Q8 version is fine for processing typical photos intended for viewing on a computer screen. If you are dealing with film, scientific, or medical images, use ICC color profiles, or deal with images that have limited contrast, then the Q16 version is recommended. The win32' packages are for 32-bit or 64-bit Windows, whereas the `win64 packages are only for 64-bit Windows. The 64-bit version allows processing larger images in memory (rather than disk files), provided that the system has more than 2GB of RAM installed. Memory access is 1000 times faster than disk access. GraphicsMagick is originally derived from ImageMagick 5.5.2 as of November 2002 but has been completely independent of the ImageMagick project since then.