I ran across a good freeware Notepad replacement, with built-in spell checker, at http://gammadyne.com/docpad.htm
. If you like lots of bells and whistles, you might consider this one.
DocPad is a superior alternative to Notepad. Although it fills the same role, plain text editing, it has many advantages: 10-level undo, alphabetization, block indent/unindent, bookmark, case conversion, encoding conversion, file history, jump to line, jump to offset, keyboard macros, print preview, search and replace, spell checking, statistics, variable pitch font, and much more. It also includes a built-in calculator, calendar, and character map.
The Spell Checker is a separate download, available at http://gammadyne.com/speller.htm
The skins are pretty cool, and you can even create your own! If you like wood at all, give that one a try, it's the one I settled on.
If you have been looking for a replacement for Notepad, you might give this one a chance, you never know..... :-)
Enjoy the journey!