Process clustering
Unnode.js is a framework that makes creating Node.js back ends easy. It provides you with process clustering, proper logging, web backend abstraction and vhosts (domain-based routing). It's small, simple and doesn't force you into a strict framework-structure; you can still organize your project as you like.
It is a bare-bones framework for creating hand-crafted, custom back ends where speed and precision are of the essence.