Notepad++ is a free source code editor and Notepad replacement that supports several languages.
Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features.
Vim ("Vi IMproved") is an advanced text editor that allows syntax highlighting, word completion and has a huge amount of contributed content. It also has a GUI version called GVim.
Most simple text editor. Just plain text, saves in .txt format. Not available for download; bundled with all versions of Windows.
PSPad is a freeware programmers editor in 8 languages for Microsoft Windows operating systems. Some features are highlighted syntax, ftp, projects and so on. Code explorer for Pascal, C/C++, INI, HTML, XML, PHP and more in development, internal web browser with APACHE support.
TextMate brings Apple's approach to operating systems into the world of text editors. By bridging UNIX underpinnings and GUI, TextMate cherry-picks the best of both worlds to the benefit of expert scripters and novice users alike.
jEdit is a mature programmer's text editor with hundreds (counting the time developing plugins) of person-years of development behind it. jEdit beats many expensive development tools for features and ease of use AND it is released as free software with full source code...
Syntax Highlighting: Colorize more than 50 pre-installed major languages like HTML, PHP, Python, Ruby or Markdown. You can also create your own settings.
TextWrangler is the powerful general purpose text editor, and Unix and server administrator’s tool.Discontinued
The developers announced that development of TextWrangler has stopped, in favor of concentrating their efforts on the development of BBEdit.Quoted from the TextWrangler webpage, "We are sunsetting TextWrangler, and we encourage anyone interested in TextWrangler to download and use BBEdit instead."