I'd simply like not to have a JQuery based HTML editor that use <b>, <i>, <font> and all those deprecated tags. Can you help me please?
Bespin is my choice http://mozillalabs.com/bespin/ - it's not wysiwyg though, more like textmate in a browser. There is a jQuery extension here to make using it with jQuery simpler: http://www.balupton.com/sandbox/jquery-sparkle/demo/#bespin
TinyMCE I believe also can do what you want with appropriate options enabled. http://tinymce.moxiecode.com/