WYSIHTML5 is an open source rich text editor, developed by Xing, that produces non-bloated, valid HTML5 code.
The editor doesn’t rely on any JS framework, it is lightweight andloads/works pretty fast.
textarea fields and provides the major stuff including text styles (bold, italic), lists, headers, inserting images or links and coloring the text.
There is speech-input (which is only displayed in Chrome) and HTML source code can be viewed with a click.
WYSIHTML5 speeds up the writing process by auto-linking the URLs and offers a secure usage by using sandboxed iframes in order to prevent identity theft through XSS.