Sencha folks have been working on an awesome new tool. It’s called fiddle.sencha.com:
If you’re familiar with jsfiddle.net, it’s essentially the same concept, but targeted at ExtJS and Sencha Touch, with some tasty features thrown in, i.e. performance analysis:
Even though it’s in beta, I’ve been using it for sometime now without much issue. Fiddle away!
fiddle.sencha.com for ExtJS & Touch,