If you're one of those people whom dislike thick fat development IDE's, and at the same time you miss many of those rich highlighting and search/replace features in your simples editors.
Then go no further...
Try "The Programmers Notepad".
1.3 MB in size, free, wonderful, and very light-weight.
I loved it from first 'site' : /
at http://www.pnotepad.org/
I think I'll let go of EditPlus. My X-Favorite Editor.