HTML5 video
Support for HTML5 video has been steadily increasing. In June 2013, Netflix added support for HTML5 video. In January 2015, YouTube switched to using HTML5 video instead of Flash by default. In December 2015, Facebook switched from Flash to HTML5 for all video content.
Datacopia
Datacopia is built in HTML5 and runs on any platform with a browser that supports the Html5 canvas element. It makes use of D3.js and the NVD3 library to provide its interactive graphics. It uses the Heroku PaaS stack.