A core set of the apps were written in HTML+JS using the Enyo framework, but apps can also be written quite easily in C++, too. Enyo2 was released recently and

A core set of the apps were written in HTML+JS using the Enyo framework, but apps can also be written quite easily in C++, too. Enyo2 was released recently and is being incorporated into Open WebOS: http://enyojs.com/ http://enyojs.com/ How anyone can stand to use javascript for anything significant is beyond me, but Enyo, and hopefully whatever FxOS uses, can have substantial parts of an app's logic written in something like Coffeescript or Clojurescript.