Download the following if you require older versions of CKEditor.
The nightly build is updated daily. It contains the "master" branch of CKEditor ready for release.
CKEditor 3.6.4 for ASP.NET
ASP.NET Control to easily integrate CKEditor on ASP.NET pages.
All downloads are free and fully functional!
The above are Open Source applications. No trials, demos, adware or tricks. For more information read the license conditions.