Rich text formatting (RTF) editor plugins for Rails 3 and jQuery website? [closed]

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Which RTF editor do you use?

We're on Rails 3 and jQuery and looking to implement a low-maintenance RTF editor. We prefer to use a third-party plugin rather than build from scratch.

Which one do you use today, and what are the pros/cons?

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I've used CKEditor, its also customizable easily.

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I have used MarkItUp. It is easy to use and also customizable.