任何所见即所得的富文本编辑器，不使用HTML（或CONTENTEDITABLE的designMode），一拉（新的）谷歌文档？

Besides the new Google Docs, all the other WYSIWYG web-based rich text editors (ckeditor, tinymce, old Google Docs) I've seen are based on contenteditable or designMode. I personally hate using these editors. It doesn't take much formatting or copying/pasting before the whole experience turns into an exercise in frustration. Returns suddenly start getting double-spaced, unintended formatting gets introduced via pasting from other HTML sources, undo's/redo's are completely broken, formatting becomes excruciatingly difficult to control, etc.Besides the new Google Docs, all the other WYSI