Creating your own programming language

Has anyone here every created their own programming language? What was the syntax like, and what did you use to implement the language? Using Haskell to implement your language is cheating BTW, so don't even post here if your language is made from Haskell.

Here's a sample of my programming language. I used Bison/Flex to lex and parse it. Everything was done in C. It's very simple and similar to C.


int
main()
{
  print "Hello World";
  return 0;
}