Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
AkelPad - A simple notepad-like text editor with many features. It is designed to be a small and fast.
Notepad3 - Notepad3 is a fast and light-weight Scintilla-based text editor with syntax highlighting.
Notepad2 - Notepad2 is a fast and light-weight Notepad-like text editor with syntax highlighting.
TED Notepad - TED Notepad is a portable text editor software that deals with a large variety of text processing tools, supplemental text clipboards, high accessibility through hotkeys, and a customizable number of settings and options.
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.