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http://www.gnustep.org/ - http://www.gnustep.org/
A GNU project to write a completely OpenStep compatible programming environment based on Objective-C, with intentions to also maintain Mac OS X compatibility. |
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http://developer.apple.com/cocoa/index.html - http://developer.apple.com/cocoa/index.html
Apple's Objective-C based programming environment for Mac OS X. |
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Portable Object Compiler - http://users.telenet.be/stes/compiler.html
A preprocessor that will convert Objective-C into regular C. |
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OpenStep Specification - http://www.gnustep.org/resources/OpenStepSpec/OpenStepSpec.html
A copy of NeXT Computer's OpenStep Specification. This is the specification that both Cocoa and GNUstep are based on. |
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ActiveDeveloper - http://www.interactive-technology.com/
Interactive runtime Objective-C IDE for Windows, Mac OS X, OpenStep NIS. |