ObjectiveWindows
This is a library for developing Win32 applications in Objective-C. To develop an app with the ObjectiveWindows library requires:
But this is not a library for developing GNUstep applications. It only makes use of the GCC compilers and other tools included in the version of MinGW and MSYS that GNUstep installs. It also makes use of GNUstep's Foundation library (NSArray, NSDictionary, etc). But the UI class library is a from-scratch design for the Win32 API, not for GNUstep.
Proof Of Life
Status
2011/12/28: Just beginning. Initial commit to github. Can barely display a window with a button and some text. The code's not pretty. There's lots of refactoring to do for the little bit that's there. But it compiles clean and it works. For me. So far.
Things like building and packaging for distribution have not even been thought about yet... much.
For The Love Of All That's Good And True, Why?
Why not? I develop for Windows. I like C#/.Net. I even like doing plain old Win32 development with C and C++. But I also develop for the Mac and iOS and I really like Objective-C. So I thought, why not?
Why Not Just Use GNUstep? Or Cocotron?
Fine, if that's what you want, go do so. You can apparently make some very fine "native Windows" looking apps with GNUstep. Cocotron is likewise amazing. Code on the Mac, cross-compile for Windows... even Linux. They are both great projects. If they fit your needs and desires then by all means use them and support them.
I didn't want to duplicate the Cocoa/GNUstep API and UI elements on Windows. I wanted an honest-to-goodness Win32 UI library that did things the Windows way, for Windows, developed on Windows.