SourceEdit sure has it's similarities (functionality-wise) with
HTML-Kit...which happens to be my all-time favorite editor. However, on a search for tidying up Word html, I encountered an editor that could be a real contender for that position!
Taken from the author's page:
tsWebEditor is an editor for HTML, PHP, Perl, JavaScript, CSS and many other languages. It displays the source code colored (syntax highlight), code hint for functions, code completion (PHP, JavaScript, ASP, HTML), code browser, PHP debugger and syntax validation, help, CSS wizard, HTML tag editor, HTML syntax validation, and an easy to use SQL Designer.
The organization behind the SVN project are also behind this editor, which makes it more than OK in my book!