Gnustep

GNUstep main GNUstep, a free software implementation of the NeXT libraries, began at the time of NeXTSTEP, predating OPENSTEP.

Paradigms GNUstep inherits some design principles proposed in OPENSTEP (GNUstep predates Cocoa, but Cocoa is based on OPENSTEP) as well as the Objective-C language.

GNUstep also features a fully functional development environment, reimplementations of some of the newer innovations from Mac OS X's Cocoa framework, as well as its own extensions to the API.

History GNUstep began when Paul Kunz and others at Stanford Linear Accelerator Center wanted to port HippoDraw from NeXTSTEP to another platform.

The GNUstep developers track some additions to Apple's Cocoa to remain compatible.

The Miller Column browser from GNUstep is a type of Navigational file manager.