Editing OpenStep (section)

===GNUstep===
{{Main|GNUstep}}

GNUstep, a [[free software]] implementation of the [[NeXT]] libraries, began at the time of NeXTSTEP, predating OPENSTEP. While OPENSTEP and OSE were purchased by Apple, who effectively ended the commercial development of implementing OpenStep for other platforms, GNUstep is an ongoing open source project aiming to create a portable, free software implementation of the Cocoa/OPENSTEP libraries.

GNUstep also features a fully functional development environment, reimplementations of some of the newer innovations from macOS's [[Cocoa (API)|Cocoa]] framework, as well as its own extensions to the API.