Kupu is a â€˜document-centricâ€™ open source client-side editor for Mozilla, Netscape and Internet Explorer. The editor allows you to add WYSIWYG XHTML editing to any of your web applications or content management systems.
What is most impressive about Kupu, is that it uses CSS in favor of HTML for layout and presentation. Â I suppose that most applications and tools that I feature on this site wheel gesture points for featuring CSS over antiquated methods that we all know we should be moving away from anyway. Seriously though, if you are still on the fence about Web standards go take a look at Kupu as a glimpse of what the future holds.