If you have ever opened multiple files in Notepad, and wished its interface were more like a word processor, try this...
It's described as a generic source code editor.
I LOVE that:
I can open multiple documents and have tabs to switch between files...
...and there's an "explorer" available to make it easy to get to files, and then open them.
The version I use, Notepad++ Portable (there's nothing to install), is available at http://portableapps.com