Envolve provides a very simple way to add Facebook-style chat to your website or blog. Just copy and paste a couple of lines of code and your site will gain a chat room at the bottom of the screen (collapsible, so it'll take the minimum amount of space). And not just any chat room, either. You're able to have multiple tabs for separate conversations; chats that stay with you as you move from page to page; even real-time translation for chats with visitors from around the world. And each chat gets its own short URL, so memorable conversations can easily be reviewed or shared with others.