GNUstep.orgGNUstep Overview GNUstep is a mature Framework, suited both for advanced GUI desktop applications as well as server applications. The framework closely follows Apple's Cocoa (formerly NeXT's OpenStep) APIs but is portable to a variety of platforms and architectures. Read more about the GNUstep project, or the people behind it. GNUstep offers Development tools for command-line and GUI development,
https://gnustep.github.io/resources/documentation/User/GNUstep/gnustep-howto.pdf
