Frameworks

Core frameworks

Base - Foundation kit

GUI - Application kit

Extension frameworks

(official parts of GNUstep project)

GDL2 - Database frameworks (Enterprise Objects/EO)

StepTalk - Scripting framework

GNUstepWeb - WebObjects 4.x compatible framework that provides an MVC approach to building web applications and which integrates tightly with GDL2 to provide easy access to database objects.

Other frameworks

(not official parts of GNUstep project)

DevelopmentKit - computer aided development

[MusicKit] - The MusicKit is an object-oriented software system for building music, sound, signal processing, and MIDI applications. It has been used in such diverse commercial applications as music sequencers, computer games, and document processors. Professors and students in academia have used the MusicKit in a host of areas, including music performance, scientific experiments, computer-aided instruction, and physical modeling.

Bundles

Backend - obligatory bundle for GNUstep backed graphics system

Camaelon - theme bundle

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See also: How to make frameworks scriptable