Can Objective-C be used for non-Apple programming?
Java, C, C++ etc can be used for several types of computers and even mobile phones.
But, can Objective-C be used for anything except Apple products? Could I make an Objective-C program for a Windows machine (or linux), just like I do for java?
This link should answer your question: gnustep.org.
The purpose of this project is to create a free and open version of the Cocoa (formerly known as NeXTSTEP/OpenStep) APIs and tools for as many platforms as possible.