I'm going to a farm, I think there's no computers there and my laptop is broken. I want to print the code of some of my projects so I can make code review while I'm there. I'll be nice if the syntax highlight is printed too.
Editors: Vim, Notepad++
Code: Html, CSS, Javascript
P S : I don't know if I didn't explain myself very well, but I want to print syntax highlight in a paper (A4).
a2ps tool produces nice PostScript files for program listing printing.
Vim has :TOhtml command which produces HTML with current open file highlighted according to Vim syntax coloring. GVim has Syntax -> Convert to HTML menu for this.
If you use LaTeX, look at listings package (pdf documentation at CTAN). It's a very good solution for including your code in documentation/presentation.
All these tools support syntax of many programming (and non-programming) languages.
In emacs use ps-print-buffer-with-faces. There is also ps-print-region-with-faces for those occasions when you only want part of a file...
Use M-x <command> to invoke commands by name. Use C-h f <command> for help on a command and also to learn what (if any) keybinding it has.