I don't like C, so I have never programmed in it and probably never will. If I need a low level thing done, I reach for the one thing that makes everyone scurry away: Forth. Forth si completely unlike everything else. Those who use Forth live in a different universe than other programmers. It is more like a religion than a language. If you thought EMACS adherents were strange, you have never met Forth folks. Forth was born in another time, long before GPL. Most Forth implementations are public domain and you can do with them what you will. The two listed here are not, both being semi-commercial, but offering free versions. Forth is.