1)   Ektron eWebEditPro 4.2
Ektron eWebEditPro is the leading multi-language, browser-based, WYSIWYG Web content authoring and editing tool that replaces text area fields in dynamic Web sites or browser-based applications.

 2)   XStandard XHTML WYSIWYG Editor 1.6.2
The leading, standards-compliant plug-in XHTML WYSIWYG editor for Windows and browser-based (IE / Firefox) content management systems. Multilingual, fully customizable. Generates clean XHTML Strict or 1.1 markup. Uses CSS. Lite version is free.

 3)   Simpletidy 2.2.0.10
Simpletidy cleans and converts your HTML source to wellformed XHTML 1.0. Simpletidy does the job with the click of a button. Easy and simple to use interface.