The GNU C/C++ compiler. Working on a game console with a proprietary compiler that let you pick: a) 16 floating point registers and 32 bit pointers or b) 32 floating point registers and 64 bit pointers. And also a shitty solution for a cpu bug. Or, GNU compiler! I'll have all my floating point registers, but 32 bit pointers, oh, and can we handle the bug without just adding a nop every bloody time it might happen? Thanks! It had been around a long time by that point, but it made a 10x difference on our project.