Richtext editor with smarttags

I'm looking for a richtextbox control which preferably has support for custom smart tags. The standard rich text edi开发者_StackOverflow中文版tor in .net is a bit limited, so I'm just wondering if someone has a control to recommend. Some features I'm looking for is - being able to represent links with a different text than the link itself - being able to add a custom set of smart tags, like geo-positions or dates - mouse hover and custom context menus

Anyone know some editors that support some of this features? :)

TinyMCE is an amazing control/product. It's very extensible so I'd be surprised if it couldn't do what you want.