Emacs is a powerful text editor and is a great code editor for nearly any language. It has a steep learning curve, but it is very powerful once you learn it.

If you have a UNIX based system, chances are emacs is installed already.  If you don't, here are some places to look:

• Source code for most UNIX machines - ftp://ftp.gnu.org/gnu/emacs

• Windows binaries - ftp://ftp.gnu.org/gnu/windows/emacs/

• A non-terminal emacs for OS X - http://mindlube.com/products/emacs/index.html

Related:

• Emacs Wiki - http://www.emacswiki.org/cgi-bin/wiki