ImageKit vs CImg: What are the differences?
ImageKit: Automate image optimization on all platforms. It is an image optimization solution that offers smart image optimization in real-time, enabling you to easily optimize images via dynamic resizing and cropping as well as seamless and fast delivery. The software allows you to reduce images sizes while retaining high quality resolution; CImg: A small and open-source C++ toolkit for image processing. It mainly consists in a (big) single header file CImg.h providing a set of C++ classes and functions that can be used in your own sources, to load/save, manage/process and display generic images.
ImageKit and CImg can be categorized as "Image Processing and Management" tools.
CImg is an open source tool with 701 GitHub stars and 163 GitHub forks. Here's a link to CImg's open source repository on GitHub.