Literate-programming allows the programmer to write a program's code and its code's documentation, with equal importance accorded to both. This helps producing a well-documented code.

FWEB has grown out of Knuth and Levy's CWEB; it is far more configurable and customizable than the original, uses LaTeX to typeset documented code, provides a very powerful macro processor...

Ratfor programmers may appreciate the builtin Ratfor-to-Fortran translator if they don't have the right compiler.

Other languages than those cited may be used, but without code pretty-printing.