Notepad++ Portable

Notepad Portable is the handy Notepad text editor packaged as a portable app so you can do your development on the go.

It has all the same great features of Notepad including support for multiple languages and an extensive plugin system, but there's nothing to install.
Main features:
-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