I think jsFiddle is great! However, I haven't really tried any of the others. This one looks nice, and just at first glance one thing that I find really interesting is the built in console. I think the devs at jsFiddle should totally implement something like this. Probably the biggest reason I don't use jsFiddle more often is that after I build a demo, occasionally I will need to use the Chrome console to get at and inspect one of my objects or the like, and for whatever reason I can't get at the objects in my fiddle, the console never seems to work right. I will probably give this one a whirl instead the next time I want to use jsFiddle. If everything else is on par with jsFiddle and it has a good console with visibility of all my objects then I'll probably switch to it.

Does anyone know if there is a way to get the Chrome console to work right, ie. have visibility to all the variables, functions, etc that I create in my fiddle?

In chrome you can change the context like this: http://img42.com/oNrDj

There is also CodePen ( http://codepen.io/ ), and dabblet ( http://dabblet.com/ ) now seems to have (alpha) javascript support, too; the more, the merrier :D

jsfiddle is SO much better. I respect Remy, but I just like the way jsfiddle is. I tried all of them out and I found that jsfiddle > jsbin > codepen > others. The panels are just more intuitive and it feels less constrained than the others.

yeah generally i've preferred fiddle, but this is a nice redesign. might give it a whirl the next couple of times i need it, see how it goes.

I wonder why? It doesn't update result as you type, doesn't support Less, CofeeScript etc., doesn't have console and until recently it used ancient and broken version of codemirror.

Also http://jsconsole.com which also lets you connect to remote sessions (eg on a phone).