Here are some key features of "Notepad plusplus Portable":

· Syntax Highlighting and Syntax Folding (C, C++, HTML, ASP, Java, Pascal, CSS and more)
· User Defined Syntax Highlighting
· Auto-completion
· Multi-Document
· Regular Expression Search/Replace supported
· Full Drag ‘N' Drop supported
· Zoom in and zoom out
· Multi-Language environment supported
· Brace and Indent guideline Highlighting
· Macro recording and playback

Home Page - http://notepad-plus.sourceforge.net/