SciTE - SciTE is a SCIntilla based Text Editor.
Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
EdytorNC - This simple to use text editor is basically designed for performing both plain and complex editing and allowing the users to edit the source code of the programs and even edit web pages as well.
Sublime Text - 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. Fully customizable with macros, and syntax highlighting for most major languages.