grammar parsers

I want to made a simple programming language, what should I use for parsing:

1. lex + yacc
2. lemon
3. parsec
4. other (what?)

>>1
If you want to make a simple language, you're doing it wrong if you require a parser generator. A simple language should be a Lisp or a concatenative language like Forth, or something equally simple. If your language is so complex that you can't write its parser by hand, code in it it will be too complicated to generate as well.