Rich-Text Editors, inline content editors, WYSIWYG editors – or whatever you want to call them – are web applications that enable users to enter, edit and manipulate alphanumeric characters while visiting your website. Wherever you have a textarea form input on your site, chances are good that its usability could be improved with a Rich-Text Editor.

Been using CKEditor, which used to be FCKEditor, for years in my projects.

Link:
http://sixrevisions.com/user-interface/…

Check out these posts too:

  1. CoffeeCup Free HTML Editor better than NVU
  2. Rich Editing in BlogThis!
  3. emEditor releases version 8
  4. Google introduces Event Rich Snippets to Search Results
  5. EmEditor is doing it all right
  6. Microsoft's Rich Signature (undocumented)
  7. Free Online Multimedia Editors