This makes me wonder. Which of the two is the better cross-browser HTML editor?
FreeTextBox is widely used in .NET. One proof of this is that Rainbowportal and Dotnetnuke is using this editor. On the otherhand, FCKedit is much more versatile since it can be used on .NET, Java and other platforms. FCKEditor is currently an opensource project and is is licensed under the GNU Lesser Public License.