Hallo.js, a simple rich text editor for the web - Henri Bergius in Berlin, Germany

Hallo.js is a simple rich text editor built as a jQuery UI widget and utilizing the HTML5 contentEditable functionality for allowing in-place editing. This sort of real in-place editing differs from more traditional editors like TinyMCE in that the content is never detached from its place on a page, and so for instance all CSS rules apply to it. This makes the editing experience much more true WYSIWYG.