BSD

> They weren't freeloading, they were contributing as well, including the whole ObjC language, if under a bit if protest.

"A bit under protest" is a bit of an understatement -- NeXT only contributed their Objective-C frontend back to GCC after the lawyers got involved.

In a bit of irony, the fallout from that led to GCC deliberately making it harder to add proprietary extensions, which also made it harder to extend in any way, which led to the creation of LLVM.