GNUstep is a set of general-purpose Objective-C libraries, originally based on the OpenStep standard jointly developed by NeXT and Sun and now following Apple's Cocoa APIs. The libraries consist of everything from foundation classes, such as dictionaries and arrays, to GUI interface classes such as windows, sliders, buttons, etc. Please contact the GNUstep maintainers at in case of questions and help offers. WWW: http://www.gnustep.org/