In case you’re not familiar, Sandcastle is a live-coding app for viewing Cesium examples and testing code quickly. The Cesium team uses it all the time!
For those of you who aren’t already seasoned Sandcastle users, we’ve just created a new tutorial: http://cesiumjs.org/tutorials/Sandcastle-Tutorial/
Even if you’ve used Sandcastle before, consider checking it out! There are a lot of lesser-known features.
PS. Have suggestions for how we can improve Sandcastle? Post in this thread!