1. TinyMCE
Free, open source, lightweight online editor, based on JavaScript, highly customizable and cross-platform.
2. FCKEditor
Free, open source, a large number of users online editor, with good community support.
3. YUI Editor
Belong to the Yahoo! YUI part, can output pure Xhtml code.
4. Nicedit
Simple, easy-to-use, lightweight, good-looking online editor.
5. Kupu
Open source, support Ajax save, Cross-platform, easy to integrate, launched by Oscom.
6. Free Rich Text Editor
Very easy to deploy, output XHTML code, rich in functionality.
7. Webwiz Richtexteditor
This is a commercial product that is not free, but features very rich, based on Asp,javascript and DHTML.
8. Xstandard
This editor generates pure XHTML code that conforms to the standard.
9. Damn Small Rich Text Editor
Based on jquery and PHP backstage, very small (~18k), but rich in functionality.
Widgeditor
Simple, Easy-to-use, open source online editor, even if the browser does not support JavaScript, can still work well.
Kevin Roth ' s Cross Browser Rich Text Editor
A nice editor that supports skin, conforms to XHTML standards, Cross-browser compatible, and has two versions of free and premium editions.
Openwysiwyg
With many excellent features, easy to deploy, very fast.
CodePlex Rich-Text Editor
Based on ASP. NET's online editor, currently only supports IE and Firefox.
Freetextbox
Integrates the album, spell check and other functions, especially for the ASP.net project.
Silverlight Rich-Text Editor
It works well with Microsoft's Silverlight, but it seems that the original author no longer updates the project.
Bxe (Bitflux Editor)
has been open source since 2002, has a group of very loyal users and communities, is said to be one of the best WYSIWYG editor.
markitup!
This online editor is based on JQuery, lightweight, supports keyboard shortcuts, and supports a variety of code, including HTML, textile, Wiki Syntax, Markdown, BBCode.
Dijit Editor for Dojo
Based on the Dojo JavaScript framework, output clean HTML code, support Plug-ins, have a fresh button.
Editarea
Easy integration, clean code online editor, real-time syntax highlights, automatic indentation, multi-language support, multiple instance support, Full-screen mode and other functions.
WYMeditor
Exporting clean XHTML + Sctrict code, focusing on structure and semantics, is the best solution for exporting structured XHTML code.
Whizzywig.
This online editor features multiple browser support, WEB security color selector, support for tables, pictures, Word code cleaning, spell checking, and more.
Xinha
Based on BSD protocol, easy to deploy and expand, with good community support.
Rich-Text Editors for and beyond
Rui Shang Enterprise CMS
More Web editor Download address http://www.jb51.net/codes/editor.html