Notation might fit the bill. [...] I'm also hoping for some form of Dropbox sync feature..-Dirhael
Their Web page says Portability: Keep your notes synced among your devices using Simplenote
I wish people would routinely produce no-install versions, so much easier to make quick tests...
-rjbull
A portable version would also make it quite easy to work with services such as Dropbox. That said, as a workaround I just moved the
%appdata%\Notation\Notes folder to my Dropbox folder (which I've got stored on my NAS), and just symlinked it back. Now it syncs just fine, although it requires you to restart the app on the other PC's if modifying or adding notes on another.