sample editor - same as stackOverflow

I want to create an editor and store formatted text in database. I want just a sample editor do functions like StackOverFlow editor:

dreamweaver live view alternative

Are there any IDE\'s that have live html rendering which updates on save? I don\'t like Dreamweaver\'s live view because it reloads the entire page/css/js making it slow... I want something more simil

How do I create a RedCloth live preview using jQuery?

I\'ve had problems with many of the WYSIWYG gems/plugins for Rails, so I\'m building one mysel开发者_StackOverflowf using the RedCloth gem. I want users to see a live preview of their HTML-formatted t

tvb封杀邓萃雯，前辈们怎么看？？