Redactor is a jQuery WYSIWYG Editor with a streamlined interface for online editing of your documents. Redactor allows you to use multiple editors on a single page.
It also has built-in keyboard shortcuts for easy use of formatting and editing features. Redactor has two versions of its toolbar: standard and minimalistic. You can add new custom buttons to it or simple turn it off.
Redactor also has image and file upload support. Additionally it has an auto-save feature which can be set to save the data in the editor at a user-specified time interval and a full-screen mode.