Emacs

Emacs is a comprehensive editor with support for quite a few programming languages such as LaTeX, C, HTML, Wiki etc.

Today, most the two most widely used version is GNU Emacs and XEmacs.

Since Emacs is written with UNIX in mind it might seem at bit awkward for Windows users, however distributions prebuild with a "W32-feeling " may be found on EmacsW32 Home Page or on the GNU FTP: [1]. The latter is prebuild with AUCTeX (a major mode for writing LaTeX.