I have been searching for something that does this for a while now, but with no luck yet... We have an internal application that stores/uses text in HTML format. Now I am looki
CKEditor (formerly fckEditor). It's everything including the kitchen sink, but you can configure the toolbar, so if you only want basic HTML features you can do that. It has examples for all kind of web programming langugages including ASP.NET, see http://ckeditor.com/demo . Also, it's open source.