Crunch PNG vs GraphicsMagick: What are the differences?
Developers describe Crunch PNG as "Insane PNG image optimization". Crunch is a tool for lossy PNG image file optimization. It combines selective bit depth, color type, and color palette reduction with zopfli DEFLATE compression algorithm encoding using the pngquant and zopflipng PNG optimization tools. On the other hand, GraphicsMagick is detailed as "The swiss army knife of image processing". GraphicsMagick is the swiss army knife of image processing. Comprised of 267K physical lines (according to David A. Wheeler's SLOCCount) of source code in the base package (or 1,225K including 3rd party libraries) it provides a robust and efficient collection of tools and libraries which support reading, writing, and manipulating an image in over 88 major formats including important formats like DPX, GIF, JPEG, JPEG-2000, PNG, PDF, PNM, and TIFF.
Crunch PNG and GraphicsMagick belong to "Image Processing and Management" category of the tech stack.
Crunch PNG is an open source tool with 2.73K GitHub stars and 94 GitHub forks. Here's a link to Crunch PNG's open source repository on GitHub.