Notepad3 is another Free Text Editor or Free Code Editor created by Derick of Rizonesoft. This portable notepad is a Scintilla based text and code editor with syntax highlighting.
Metapad is a Free Text and Code Editor created by by Alexander Davidson that can be used as a Portable Notepad replacement. Metapad will run from Windows 95/98/NT/XP/Vista/7.
Keynote NF is a free portable note taker that might also be used as a portable diary. This simple OneNote type notebook is based on the original Keynote with (NF) new features.
TED Notepad is a Free Portable Notepad. It can be used as a complete Windows Notepad replacement that does much more than allow viewing and editing of text/code.