One of the changes in Creative Cloud 2014 is the introduction of the Common Extensibility Platform (CEP) 5.0 in many of Adobe’s apps.
CEP 5 is a major update that provides capabilities that far surpasses its predecessors. A key feature is the integration of Node.js which practically means you can use Node’s rich APIs as well as third party NPM modules within Adobe’s products.
As we move further into the HTML5 panel era, we have created a new place to host our resources. You can find many samples and resources in the Adobe CEP GitHub repository.
It includes APIs, links to documentation, tutorials and tools (including some that are created by 3rd parties), and lots of samples.
In addition, I encourage developers interested in HTML5 panels to check out the Kuler panel for Creative Cloud 2014 on the new Adobe Add Ons website. The Kuler panel is a great example of an HTML5 panel.