best free rich text editors

Found this post from Antonio Lupetti. He lists the rest Rich Text Editors ready to use in web projects with some comments and hints how to implement them on pages using a few lines of HTML code.
It seems too easy to use one of them within your software product. But, be aware of the license.

1. Yahoo! UI Library: Rich Text Editor



Offered under a BSD License



2. Free Rich Text Editor



Offered under a Creative Commons Attribution 2.5 Generic license



3. TinyMCE



Offered under a LGPL license, also known as the GNU Lesser General Public License, former GNU Library Public License.



4. FCKeditor



Offered under the GPL, LGPL and MPL open source licenses but an Closed Distribution License - CDL is also available



5. Xinha



Offered under the original htmlarea licence, essentially this is a BSD style licence