On the front end, I rolled my own custom framework. I use Handlebars for templating and various mini-libraries for some functionality (shout out to Modernizr, Isotope, and Bespoke :) in addition to jQuery. For CSS I use Compass/SASS. I actually wrote a blog post about it (http://blog.mightyspring.com/post/58803131171/purposefully-a...)
That's pretty cool! Figured about Python (saw gunicorn in HTTP headers).
What blew me away, is the fact that you're using a custom framework for the user on-boarding complex/heavily-ajaxified UX... I'd be willing to get updated about how does that scale up!
To be honest, the onboarding experience is pretty silo'd in terms of scripting, although we're thinking about using the same functionality (guided walkthrough) for other parts of the experience, so I may refactor it for reuse elsewhere :)
On the front end, I rolled my own custom framework. I use Handlebars for templating and various mini-libraries for some functionality (shout out to Modernizr, Isotope, and Bespoke :) in addition to jQuery. For CSS I use Compass/SASS. I actually wrote a blog post about it (http://blog.mightyspring.com/post/58803131171/purposefully-a...)
I think that covers it!