I have no idea what this site does. I've read 7 paragraphs and suppose I should "Open the CSS panel" (although the name implied something javascript related) because it's the only call to action, but it does nothing.
It's just an HTML/CSS/JS sandbox with collaborative features, similar to jsfiddle, which I believe is more well known (at least, among the people I work with).
I haven't used jsbin before, but the interface looks nice, and the redesign is pretty. Jsfiddle is utilitarian; jsbin looks like it is meant to have a little more humor. They both seem to cover the same functionality, so I guess it comes down to which interface you prefer.
For quickly sharing some small piece of front end code with a remote colleague, either one of these tools is very useful.
Edit: I just noticed that visiting jsbin.com skips the whole landing page with the spinning robot, so it seems that it is as utilitarian as jsfiddle.
Hm, seems that sometimes you need to click on edit in JS bin (in the top right corner) to see the editor, http://jsbin.com/welcome/edit is the URL.
It seems like it's a JSFiddle-like editor, with a better (in my opinion) user interface, and potentially better options for sharing, not that I'm totally familiar with JSFiddle's capabilities.
I haven't used jsbin before, but the interface looks nice, and the redesign is pretty. Jsfiddle is utilitarian; jsbin looks like it is meant to have a little more humor. They both seem to cover the same functionality, so I guess it comes down to which interface you prefer.
For quickly sharing some small piece of front end code with a remote colleague, either one of these tools is very useful.
Edit: I just noticed that visiting jsbin.com skips the whole landing page with the spinning robot, so it seems that it is as utilitarian as jsfiddle.