Hi everyone, I'm looking for a plugin that let my visitors left an opinion or comment in my web, just like then can do in Wordpress, or Facebook or twitter...
You need a blog widget. Watch out at musewidgeits.com and look what you like the most.
I cant find something useful
You could also use a free guestbook service.
Set everything up as you like and add an iFrame element in Muse
<iframe width="320 px" height="1600px " frameborder="0" src="http://url" scrolling="auto" allowtransparency="true"></iframe>
Maybe not the fanciest solution but could be enough and free.