WorldWind is not going to be an option in the browser much longer either. Applet support requires the Java plugin, and that's also going to be affected by the

WorldWind is not going to be an option in the browser much longer either. Applet support requires the Java plugin, and that's also going to be affected by the push to deprecate the NPAPI (plus a lot of places have it disabled already due to the ongoing security concerns). Cesium's excellent. Still missing some features compared to GE and WorldWind, but the core dev team has been cranking away on it consistently, they're very responsive to discussion, and I love being able to dive right down into the source to see how things work inside (as opposed to the giant binary black box that is GE).