Russell Maher wrote a very interesting article about using CKEditor 4 in XPages, but the current solution requires to change to HTML files directly on the server.
But with this little Hotfix you can use CKEditor form a NSF an don’t need to change the HTML files on the domino server:
1. Switch to package explorer perspective
2. Open the file ckeditor.js
3. Search for the variable timestamp…
4. …and remove the 4 characters
5. Save it. That’s it!
Now, CKEditor 4 can be loaded directly from the NSF.