GNUstep is a mature Framework, suited both for advanced GUI desktop applications as well as server applications. The framework closely follows Apple's Cocoa APIs and is portable to a variety of platforms and architectures.
High school me used to think how cool Objective-C and Cocoa was and how it was the future. And thanks to the iPhone, for a long time I was right.
But the web won the war for Cross-platform development and most days I'm glad it did.
I still remember funding GNUStep’s Kickstarter campaign a number of years ago. It unfortunately failed way short of the goal. Not all good things are destined to work.reply
Response to GNUstep: Open-source, Object-oriented, Cross-platform Development Environment: jamesvandyne.com/bab136e8-cd87-…repost
Response to GNUstep: Open-source, Object-oriented, Cross-platform Development Environment: jamesvandyne.com/bab136e8-cd87-\xe2\x80\xa6repost