You should check out http://orgmode.org http://orgmode.org as well - though I'm sure someone has mentioned it. The best part is that you do these kind of:

You should check out http://orgmode.org http://orgmode.org as well - though I'm sure someone has mentioned it. The best part is that you do these kind of: #+begin_src <lang> <options> some code #+end_src Such that you can cross between R, python, C, whatever you want, and end up with a cohesive, executable document.