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

Extract on hard disk or USB key and run Notepad++Portable.
If you use as default editor (F4 in Total Commander) edit Notepad++Portable.ini with AllowMultipleInstances=true.
Language fixed by launcher according Windows localisation : Arabic, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Farsi, Finnish, French, German, Greek, Hebrew, Hungarian, Indonesian, Italian, Japanese, Korean, Lithuanian, Norwegian, Polish, Portuguese, PortugueseBR, Romanian, Russian, SimpChinese, Slovak, Slovenian, Spanish, Swedish, TradChinese, Turkish, Ukrainian.
Settings saved in Data folder.
Settings of installed Notepad++ should be preserved.

Homepage: http://notepad-plus.sourceforge.net/