Wikipedia
Opnode
opnode, from "open node", is the term given to the open source controllers designed by www.opnode.org for the home automation community. An opnode, being a node, is part of a network. Within this network, every opnode communicates with each other, and even with third-party nodes, forming a distributed intelligence.
This initiative intends to involve the open source home automation community in the development of low cost networked controllers for the home.