I would like to talk about a stack that I think is among the most important for building a professional site.
Converting an existing site into a multilingual site has never been easier and I would like to congratulate @willwood for the lastest RWML update.
I did some demos in my themes but I already used the stack in some jobs and it works great!!
RWML stacks page
a couple of demos in my themes , hype and Tilt