Nice. Reminds me a lot of https://www.gitbook.io

We actually ended up building our own Gitbook/Bitbooks for Discover Meteor, in Meteor.

And we also have a Middleman implementation, although Middleman does 90% of the work out of the box.

In any case it's nice to see open-source options coming out so we don't all have to keep on reinventing the same wheel.