What is "ckeditor"

Ckeditor, formerly called Fckeditor, is a free and open-source, multiproposital, Javascript-based WYSIWYG online editor that creates pages visually, generating a stylized HTML output code. It is a very popular editor due to its native use in various SGC’s such as Drupal, PHP-Nuke, Joomla! and several other applications that integrate it into its structure. Its use is extremely easy and it is available for virtually all available web languages.

Source: Ckeditor